Sep <var data-var='date'> 3</var>, <var data-var='time'>19:24</var> EDT Resolved - This issue has been resolved. Duo hardware token authentication is now functioning normally on affected US deployments. Other Duo authentication methods were not expected to be impacted. Thank you for your patience. If you continue to experience issues, please contact Duo Support. Sep <var data-var='date'> 3</var>, <var data-var='time'>18:30</var> EDT Monitoring - We have seen the failure rate for Duo hardware token authentication subside on affected US deployments. Customers using hardware tokens may still experience intermittent authentication failures while we continue to monitor. Retrying the authentication attempt is expected to succeed. Other Duo authentication methods are not expected to be impacted and can be used as alternate methods if configured and available. We will continue to monitor service stability and provide additional updates as needed. Sep <var data-var='date'> 3</var>, <var data-var='time'>18:04</var> EDT Investigating - We are investigating a partial outage affecting Duo hardware token authentication for customers on affected US deployments. Customers using hardware tokens may experience intermittent authentication failures. Based on current information, retrying the authentication attempt is expected to succeed. Other Duo authentication methods are not expected to be impacted and can be used as alternate methods if configured and available. Our engineering team is actively investigating and has started mitigation steps. Updates and additional details will be provided as new information becomes available. We appreciate your patience and understanding during this time.

Duo - Partial Hardware Token Authentication Issues - United States

Aug <var data-var='date'>10</var>, <var data-var='time'>18:46</var> EDT Resolved - This incident has been resolved. New Duo account registrations are now functioning normally. Thank you for your patience. If you continue to experience issues, please contact Duo Support. Aug <var data-var='date'>10</var>, <var data-var='time'>17:04</var> EDT Identified - We have identified the issue affecting new account registrations. Our team is working on a fix and expects to release it soon. We apologize for any inconvenience and appreciate your continued patience. Aug <var data-var='date'>10</var>, <var data-var='time'>16:34</var> EDT Investigating - We are investigating an issue affecting the signup service. New account registrations are temporarily unavailable. Our team is actively investigating and working to restore normal service. We apologize for any inconvenience and appreciate your patience.

New Signups Unavailable

Aug <var data-var='date'> 8</var>, <var data-var='time'>20:07</var> EDT Resolved - Phone call authentication delivery for customers in the United States has returned to normal operation. If customers continue to experience issues, please contact Duo Support. Aug <var data-var='date'> 8</var>, <var data-var='time'>19:04</var> EDT Monitoring - We are seeing recovery for the issue related to a third-party carrier disruption that caused phone call authentication failures for customers in the United States. We are actively monitoring phone call authentication delivery and will provide another update once the issue is fully resolved. Aug <var data-var='date'> 8</var>, <var data-var='time'>17:13</var> EDT Identified - We have identified an issue causing phone call authentication failures for customers in the United States. This is related to a third-party carrier disruption. We are actively monitoring the carrier issue and working with our provider as needed. Please check back here or subscribe to updates for any changes.

Duo Phone Call Authentication Failures - United States

Jul <var data-var='date'>27</var>, <var data-var='time'>16:41</var> EDT Resolved - The SMS and VoIP delivery issue affecting users in Israel has been resolved. If customers continue to experience issues, please contact Duo Support. Jul <var data-var='date'>24</var>, <var data-var='time'>11:53</var> EDT Update - Error rates for SMS and VoIP delivery in Israel have reduced following the implemented change. We are continuing to monitor service behavior and investigate reports of intermittent failures affecting some customers. We will provide another update as more information becomes available. Jul <var data-var='date'>23</var>, <var data-var='time'>14:39</var> EDT Monitoring - We have implemented a change to address the SMS and VoIP delivery issue affecting users in Israel. SMS and VoIP delivery have recovered, and we are monitoring to confirm continued stability. Jul <var data-var='date'>23</var>, <var data-var='time'>14:02</var> EDT Investigating - We are investigating an issue affecting VoIP and SMS message delivery for users in Israel. The issue is related to an upstream carrier. Our team is working with our providers to investigate and restore normal service. Where available, users can use alternative authentication methods such as Duo Push. We will provide updates as more information becomes available.

VoIP and SMS Delivery Issues in Israel

Jul <var data-var='date'> 8</var>, <var data-var='time'>11:01</var> EDT Resolved - The third-party carrier issue affecting VoIP and SMS services in the Australia region has been resolved. Phone call and SMS authentication services are operating normally. We appreciate your patience and understanding while we addressed this issue. Jul <var data-var='date'> 7</var>, <var data-var='time'>21:22</var> EDT Monitoring - The third-party carrier has indicated that the issue affecting VoIP and SMS services in the Australia region has been resolved. Customers in Australia should see improved delivery for phone call and SMS authentication. Other Duo authentication methods, such as Push Delivery, remain available as alternate authentication methods if configured. We are continuing to monitor service stability and will provide additional updates when the incident is fully resolved. Jul <var data-var='date'> 7</var>, <var data-var='time'>19:15</var> EDT Investigating - We are investigating a third-party carrier issue affecting VoIP and SMS services in the Australia region. Customers in Australia may experience delays or failures when using phone call or SMS authentication. Other Duo authentication methods, such as Push Delivery, are not expected to be impacted and can be used as an alternate method of authentication if available. Our team is monitoring the carrier issue and working with the provider as needed. Updates and additional details will be provided as new information becomes available. We appreciate your patience and understanding during this time.

Duo - Phone call and SMS authentication issues - Australia

Jun <var data-var='date'>23</var>, <var data-var='time'>10:21</var> EDT Resolved - The SMS delivery issue affecting the UAE region has been resolved.   Our team has verified that SMS services are operating normally and full functionality has been restored. Thank you for your patience while we resolved this issue Jun <var data-var='date'>23</var>, <var data-var='time'>04:29</var> EDT Monitoring - We have mitigated the SMS delivery issue affecting the UAE region. We are actively monitoring the situation and will provide a final update once the issue is fully resolved. Jun <var data-var='date'>22</var>, <var data-var='time'>23:58</var> EDT Identified - We have identified the issue related to SMS for UAE region and are working to resolve it. Users have the option to use alternative auth methods, like Duo Push or VoIP. Please check back here or subscribe to updates for any changes.

UAE Telephony SMS issue

Jun <var data-var='date'>10</var>, <var data-var='time'>11:35</var> EDT Resolved - The issue affecting AI Assistant functionality in the US-W1 region has been resolved. Our team has verified that services are operating normally, and monitoring has confirmed system stability. Thank you for your patience while we resolved this issue. Jun <var data-var='date'>10</var>, <var data-var='time'>10:17</var> EDT Investigating - We are currently investigating an issue affecting AI Assistant functionality in the US-W1 (US West-1) region. Users may experience errors or be unable to access AI Assistant features. Our engineering teams are actively investigating the issue and working to restore normal service as quickly as possible. Please check back here or subscribe to updates for the latest information.

AI Assistant Service Disruption in US-W1

May <var data-var='date'>18</var>, <var data-var='time'>16:30</var> EDT Resolved - The issue affecting AI Assistant functionality across all US deployments has been resolved, and full functionality has been restored. We will continue to monitor service performance to ensure stability. May <var data-var='date'>18</var>, <var data-var='time'>15:27</var> EDT Monitoring - We have implemented mitigation measures and are observing improved AI Assistant performance. We are continuing to monitor success rates and overall service stability. May <var data-var='date'>18</var>, <var data-var='time'>14:37</var> EDT Investigating - We are currently investigating an issue with AI Assistant not functioning on all US deployments and are working to correct the issue as soon as possible. Please check back here or subscribe to updates for any changes.

All US Deployments: AI Assistant failures

May <var data-var='date'>13</var>, <var data-var='time'>12:03</var> EDT Resolved - The issue causing authentication failures on DUO57 with the Duo Core Authentication Service is now resolved and full functionality has been restored. May <var data-var='date'>13</var>, <var data-var='time'>11:37</var> EDT Monitoring - We have implemented a fix for the issue causing authentication failures on DUO57 with the Duo Core Authentication Service. We will continue to monitor system performance and authentication success rates and will provide further updates once the incident is fully resolved. May <var data-var='date'>13</var>, <var data-var='time'>10:52</var> EDT Identified - We have identified the cause of the issue causing authentication failures on DUO57 with the Duo Core Authentication Service and are actively working to restore service. May <var data-var='date'>13</var>, <var data-var='time'>09:22</var> EDT Investigating - We are currently investigating an issue causing limited authentication failures on DUO57 and are working to correct the issue as soon as possible.

Authentication failures

May <var data-var='date'> 7</var>, <var data-var='time'>18:40</var> EDT Resolved - The issue affecting first-time access to the AI Assistant for administrators in the EU has been fully resolved, and normal functionality has been restored. May <var data-var='date'> 7</var>, <var data-var='time'>12:30</var> EDT Identified - We’ve identified a problem impacting first-time access to the AI Assistant for administrators in the EU and are actively working to restore normal access. We’ll continue to share updates as progress is made. May <var data-var='date'> 7</var>, <var data-var='time'>10:17</var> EDT Investigating - We are investigating an issue causing failures when administrators located in the EU attempt to access the AI Assistant for the first time. Any administrators who have used the Assistant before should still be able to at this time

AI Assistant First-Time Access Failures for EU Administrators

Apr <var data-var='date'>30</var>, <var data-var='time'>14:07</var> EDT Resolved - The issue has been resolved. Services have returned to normal operation, and customers should no longer experience delays or failures. We apologize for any inconvenience caused and thank you for your patience. Apr <var data-var='date'>30</var>, <var data-var='time'>13:57</var> EDT Monitoring - Mitigation actions have been implemented. The service has stabilized and recovery is underway. We will continue to monitor to ensure full resolution. Apr <var data-var='date'>30</var>, <var data-var='time'>13:54</var> EDT Identified - We are currently addressing an issue impacting desktop authenticator enrollments .A subset of customers may experience intermittent delays or failures during desktop authenticator enrollment. Mitigation actions are in progress and are helping to reduce impact. Core authentication, SSO, and delivery services  remain fully operational.

Desktop Authenticator Enrollment Degradation

Apr <var data-var='date'>28</var>, <var data-var='time'>11:26</var> EDT Resolved - The issue causing elevated authentication latency has been fully resolved. Authentication performance has returned to normal levels, and customers should no longer experience delays during login attempts. Apr <var data-var='date'>28</var>, <var data-var='time'>10:56</var> EDT Monitoring - We have applied mitigation steps and are seeing improved authentication performance for customers in the deployment. Authentication latency has decreased, and the service is recovering. Our team is continuing to monitor the environment closely to ensure stability while we investigate the underlying cause. Apr <var data-var='date'>28</var>, <var data-var='time'>10:22</var> EDT Investigating - We are investigating elevated authentication latency affecting customers . Authentication requests are continuing to succeed at this time, but customers may experience slower-than-normal response times and degraded performance during login attempts. Our team is actively working to identify the cause and restore normal performance as quickly as possible.

Elevated Authentication Latency in DUO6

Apr <var data-var='date'>18</var>, <var data-var='time'>03:09</var> EDT Resolved - The SMS delivery issue impacting customers in the US region has been resolved. SMS passcode authentication is now functioning normally. We apologize for any inconvenience caused and thank you for your patience. Apr <var data-var='date'>18</var>, <var data-var='time'>01:39</var> EDT Update - We are continuing to investigate the SMS delivery issue impacting all customers in the US region. Push notifications will continue to work as expected. Further updates will be provided as more information becomes available. Apr <var data-var='date'>18</var>, <var data-var='time'>00:30</var> EDT Investigating - We are currently detecting an issue with carriers in the US region for SMS delivery. We are currently working with providers to restore the service. In the meantime, please use other means of authentication such as Duo Push.

SMS Delivery Failures

Apr <var data-var='date'> 9</var>, <var data-var='time'>20:33</var> EDT Completed - The scheduled maintenance has been completed. Apr <var data-var='date'> 1</var>, <var data-var='time'>16:00</var> EDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary. Mar <var data-var='date'>31</var>, <var data-var='time'>17:35</var> EDT Scheduled - Cisco is committed to providing you with a secure and reliable experience. To ensure our DUO platform continues to meet your needs, we will be performing maintenance. <big>Maintenance Details</big> : Duo will be performing a staged rollout to rotate its server certificates to a new Root Certificate Authority (CA) bundle. This process will occur globally across all Commercial and Federal deployments. <big>Date and Time</big>: April 1st, 16:00 UTC to April 10th, 00:00 UTC <big>Impact</big>: Updated Clients: Customers who have already updated their Duo software to the required versions will experience no service disruption. Outdated Clients: Effective April 15, 2026, major browsers and operating systems will no longer trust the DigiCert G1 root certificate. Consequently, Duo protected applications and integrations running unsupported versions will experience authentication failures such as Duo Push delivery issues or API errors. As this is a mandatory, device-level change, in order to prevent service disruptions, all systems must be updated to supported versions. <big>Action Required</big> Please ensure your environment is running the required software versions to prevent service disruption. For a full list of required versions and technical guidance, please refer to our official <a href="https://help.duo.com/s/article/9451?language=en_US">documentation</a> <big>Data Centers</big> Region: Global (All Commercial and Federal deployments) Services: Duo Authentication Proxy Duo Mobile (Android & iOS) Duo API & SDKs Duo Universal Prompt Various Duo-developed and partner integrations (refer to Field Notice FN74372) <big>We’re Here to Help</big> If you have any questions or need assistance, please contact our <a href="https://duo.com/support">support team</a>. Thank you for your understanding and support

Scheduled Maintenance: Duo Root Certificate Authority Bundle Replacement

Mar <var data-var='date'>22</var>, <var data-var='time'>22:23</var> EDT Resolved - VoIP authentication has returned to normal operation with sustained success rates observed. Mar <var data-var='date'>22</var>, <var data-var='time'>20:01</var> EDT Monitoring - We are now observing high rates of success of VoIP authentication. The issue appears to be resolved but we will continue to monitor the situation. Mar <var data-var='date'>22</var>, <var data-var='time'>18:13</var> EDT Investigating - We are currently observing a recurrence of the issue causing VOIP authentication failures in all deployments in the US region. We are working to correct the issue as soon as possible. While we work to resolve this, please use alternative authentication methods such as Duo Mobile Push, SMS passcodes etc. A full list of available authentication methods can be found here: https://duo.com/docs/policy#authentication-methods

Duo Phone Call Authentication Failure for US Based Carriers

Mar <var data-var='date'>22</var>, <var data-var='time'>16:33</var> EDT Resolved - VoIP authentication has returned to normal operation with sustained success rates observed. Mar <var data-var='date'>22</var>, <var data-var='time'>16:00</var> EDT Monitoring - We are now observing high rates of success of VoIP authentication. We will continue to monitor the situation. Mar <var data-var='date'>22</var>, <var data-var='time'>15:13</var> EDT Update - We are observing a recovery in voice call processing across the U.S. and are continuing to investigate the root cause of this impact. Mar <var data-var='date'>22</var>, <var data-var='time'>13:18</var> EDT Investigating - We are currently investigating an issue causing VOIP authentication failures in all the deployments in the US region and are working to correct the issue as soon as possible. At this time please use alternative authentication methods such as Duo Mobile Push, or SMS passcodes. A list of all other alternative authentication methods can be found here: https://duo.com/docs/policy#authentication-methods Please check back here or subscribe to updates for any changes.

Mar <var data-var='date'> 3</var>, <var data-var='time'>18:46</var> EST Resolved - The service outage affecting DUO81 has been resolved. All impacted customers have been successfully migrated to an alternative Duo deployment. This migration has restored full service functionality for all affected users. Mar <var data-var='date'> 3</var>, <var data-var='time'>14:18</var> EST Update - As previously communicated, a major power and connectivity outage at a third-party data center in the UAE operated by a third-party vendor has impacted Cisco Duo functionality in the region. Our engineering teams have worked continuously to implement local mitigations, but the persistent instability of the regional infrastructure has required more comprehensive measures to ensure business continuity. To fully resolve these issues and restore service stability, Cisco Duo has officially initiated its Disaster Recovery (DR) process. This involves transitioning critical service dependencies and user data away from the affected UAE region to secure, high-availability data centers. Mar <var data-var='date'> 2</var>, <var data-var='time'>15:27</var> EST Update - We remain in active coordination with our cloud service provider as they work to resolve a power outage affecting a primary data center. Connectivity issues and elevated error rates across the region will persist until power has been fully restored. The provider has indicated that full restoration and environment stabilization may take a day or more. Mar <var data-var='date'> 2</var>, <var data-var='time'>09:44</var> EST Update - Our cloud provider is responding to a power outage at a primary data center that continues to cause elevated error rates and connectivity issues across the region. While early signs of recovery were observed, the provider has since confirmed the impact is ongoing. Full restoration and environment stability are expected to take several hours. We will provide our next update within 6 hours. Mar <var data-var='date'> 2</var>, <var data-var='time'>09:00</var> EST Update - We are continuing to work on a fix for this issue. Mar <var data-var='date'> 2</var>, <var data-var='time'>04:01</var> EST Update - We are continuing to work on a fix for this issue. Mar <var data-var='date'> 2</var>, <var data-var='time'>04:01</var> EST Identified - We have isolated the issue to a regional outage and are working with our partners to alleviate the degraded performance. Mar <var data-var='date'> 2</var>, <var data-var='time'>03:31</var> EST Update - We are continuing to investigate this issue. Mar <var data-var='date'> 2</var>, <var data-var='time'>03:30</var> EST Investigating - We are currently investigating a service degradation on our DUO81 deployment and are working to restore services as soon as possible.

Service Outage on DUO81

Mar <var data-var='date'> 1</var>, <var data-var='time'>11:39</var> EST Resolved - The issue was resolved by rerouting traffic. Mar <var data-var='date'> 1</var>, <var data-var='time'>11:09</var> EST Monitoring - We have rerouted traffic and are monitoring the behavior for stable, positive results. Mar <var data-var='date'> 1</var>, <var data-var='time'>10:33</var> EST Update - We are continuing to work to reroute traffic in order to alleviate the degraded performance. Mar <var data-var='date'> 1</var>, <var data-var='time'>09:13</var> EST Identified - We have isolated the issue to a regional outage and are rerouting our traffic to alleviate the degraded performance. Mar <var data-var='date'> 1</var>, <var data-var='time'>08:29</var> EST Investigating - We are currently investigating a service degradation on our DUO81 deployment and are working to restore services as soon as possible.

Service degradation on DUO81

Feb <var data-var='date'>23</var>, <var data-var='time'>13:20</var> EST Resolved - The issue causing an abnormal phone call authentication success rate has been resolved by the third-party carrier. Feb <var data-var='date'>23</var>, <var data-var='time'>12:26</var> EST Monitoring - The issue causing an abnormal phone call authentication success rate is tied to a third-party carrier. We are monitoring the third-party's communications at this time and can confirm that Duo telephony services are functioning as expected at this time. Feb <var data-var='date'>23</var>, <var data-var='time'>09:02</var> EST Investigating - We are currently investigating an issue causing an abnormal phone call authentication success rate for the US region. Please check back here or subscribe to updates for any changes.

[US Deployments]: Duo Phone Call Authentication Failures for US Region

Feb <var data-var='date'>23</var>, <var data-var='time'>12:52</var> EST Resolved - The issue causing 504 gateway timeouts during Microsoft Entra logins when Duo MFA was called has been fully resolved. Authentication services are operating normally at this time. We will share a root cause analysis once it becomes available. Feb <var data-var='date'>23</var>, <var data-var='time'>11:38</var> EST Monitoring - We have deployed a fix for the gateway timeouts and are now seeing successful authentications. We are currently monitoring for any further issues. Feb <var data-var='date'>23</var>, <var data-var='time'>11:20</var> EST Update - We are continuing to investigate an issue where 504 Gateway timeouts are present when accessing Entra when Duo is called for MFA. We are working with our respective partners to resolve as quickly as possible. Feb <var data-var='date'>23</var>, <var data-var='time'>10:04</var> EST Investigating - We are currently investigating an issue where 504 Gateway timeouts are present when accessing Entra when Duo is called for MFA. We are working to resolve as quickly as possible.

All Deployments - Entra 504 Gateway Timeouts

Feb <var data-var='date'>19</var>, <var data-var='time'>17:32</var> EST Resolved - The deployed fix for this incident has resolved the issue. We will continue to monitor these results. Feb <var data-var='date'>19</var>, <var data-var='time'>16:30</var> EST Monitoring - We are currently monitoring the results of a deployed fix for the issue causing failures when administrators attempt to access the AI assistance for the first time. Feb <var data-var='date'>19</var>, <var data-var='time'>12:47</var> EST Identified - We have identified the issue causing failures when administrators attempt to access the AI Assistant for the first time and are working to deploy a fix at this time. Feb <var data-var='date'>19</var>, <var data-var='time'>09:35</var> EST Investigating - We are investigating an issue causing failures when administrators attempt to access the AI Assistant for the first time. Any administrators who have used the Assistant before should still be able to at this time. Please check back here or subscribe to updates for any changes.

[All Deployments] AI Assistant Outage for new users

Feb <var data-var='date'>19</var>, <var data-var='time'>13:01</var> EST Resolved - The issue causing the AI Assistant to be unavailable for administrators in India has been resolved. Feb <var data-var='date'>19</var>, <var data-var='time'>12:47</var> EST Monitoring - We have deployed a fix for the issue causing the AI Assistant to be unavailable for administrators in India and are monitoring the results of the fix at this time. Feb <var data-var='date'>19</var>, <var data-var='time'>09:46</var> EST Investigating - We are investigating an issue causing the AI Assistant to be unavailable for administrators in India. Please check back here or subscribe to updates for any changes.

[Multiple Deployments] AI Assistant not available in India

Feb <var data-var='date'>18</var>, <var data-var='time'>20:31</var> EST Resolved - The issue causing the failures for administrators access of the AI Assistant is now resolved and full functionality is restored. We will be posting a root-cause analysis (RCA) here once our engineering team has finished its thorough investigation of the issue. Feb <var data-var='date'>18</var>, <var data-var='time'>14:48</var> EST Identified - We have identified the issue causing failures when administrators attempt to access the AI Assistant for the first time and are working to deploy a fix at this time. Feb <var data-var='date'>18</var>, <var data-var='time'>13:28</var> EST Investigating - We are investigating an issue causing failures when administrators attempt to access the AI Assistant for the first time. Any administrators who have used the Assistant before should still be able to at this time.

Feb <var data-var='date'> 4</var>, <var data-var='time'>20:11</var> EST Resolved - The issue causing enrollment failures that display the error message "Your session has expired. Please try again." has been resolved. Feb <var data-var='date'> 4</var>, <var data-var='time'>19:56</var> EST Monitoring - We have implemented a fix for the enrollment failures that caused the error message "Your session has expired. Please try again." and are monitoring the results closely. Feb <var data-var='date'> 4</var>, <var data-var='time'>13:55</var> EST Identified - We have Identified the cause of enrollment failures that display the error message "Your session has expired. Please try again." and are working to correct the issue as soon as possible. As a workaround: -If using enrollment email links, update the enrollment experience settings (https://duo.com/docs/administration-settings#enrollment) to show New Universal Prompt. -If enrolling using in-line self enrollment with an existing application (https://duo.com/docs/enrolling-users#inline-self-enrollment), update that application to use the Universal Prompt (https://duo.com/docs/universal-prompt-update-guide). -You can also enroll users manually from the Duo Admin Panel (https://duo.com/docs/administration-devices#adding-a-2fa-device-to-a-user) or issue an enrollment code for self-enrollment (https://duo.com/docs/enrolling-users#generate-enrollment-codes-for-existing-users). Please check back here or subscribe to updates for any changes.

All Deployments: Duo Enrollment URL Session Expired Errors

Jan <var data-var='date'>22</var>, <var data-var='time'>15:18</var> EST Resolved - The issue causing authentication failures on our DUO4 deployment has been resolved. Jan <var data-var='date'>22</var>, <var data-var='time'>13:36</var> EST Investigating - We are investigating an issue causing authentication failures on our DUO4 deployment. Please check back here or subscribe to updates for any changes.

Is Duo down?

Duo status is UP

Lastest published events

Duo - Partial Hardware Token Authentication Issues - United States

New Signups Unavailable

Duo Phone Call Authentication Failures - United States

Duo Services, Components and Regions

Recent Duo events

Duo - Partial Hardware Token Authentication Issues - United States

New Signups Unavailable

Duo Phone Call Authentication Failures - United States

VoIP and SMS Delivery Issues in Israel

Duo - Phone call and SMS authentication issues - Australia

UAE Telephony SMS issue