Some users may experience multiple issues with their Microsoft Teams

Title: Some users may experience multiple issues with their Microsoft Teams
User impact: Users may experience multiple issues with their Microsoft Teams.
More info: Affected scenarios include, but aren't limited to the following:
Mitigated/improving:
- [Updated] Users logging in or unlocking their devices after some time may have missing messages. We believe that this symptom has been addressed.
- [Updated] Users may have been unable to load messages in channels and chats. We believe that this symptom has been addressed.
- [Updated] Users were unable to view or download their media (images, videos, audio, call recordings, code snippets). We believe that this symptom has been addressed.
- [Updated] Some users were experiencing delays sending and receiving chat messages. We believe this symptom has been largely addressed, though some users may still experience brief delays.
- [Updated] Anonymous users may be unable to join meetings. We’re seeing improvement in this area but some users may still be affected by this scenario.
- [Updated] Teams connectors for Power Automate/Power Apps were experiencing errors. We believe that this symptom has been addressed.
- [Updated] Call Recordings might take longer to appear in user's OneDrive for Business and SharePoint Online. This symptom has been addressed.
Still affected/undergoing further evaluation:
- Users may be unable to load previous Copilot history, or new history is not written
- Bots may be unable to download attachments
- Sending and receiving read receipt notifications may be delayed
- Users may experience issues resuming or rejoining meetings.
- Users within organizations leveraging an Information Barrier may experience issues joining meetings
- Users performing a cold boot may not be able to log into teams and will see an "oops" page
Current status: We’re seeing significant improvements with many of the Teams features affected by this incident as we continue to apply mitigations and optimize traffic. We’re evaluating the remaining impact scenarios and are developing fixes and workstreams to address all lingering impact associated with this event. Please see the “more info” section above for the latest information on each impact scenario.
Start time: Friday, January 26, 2024, at 2:55 PM UTC.
Next update by: Saturday, January 27, 2024, at 3:00 AM UTC.

Title: Some users may experience multiple issues with their Microsoft Teams
User impact: Users may experience multiple issues with their Microsoft Teams.
More info: Affected scenarios include, but aren't limited to:
- Users performing a cold boot may not able to log into teams and will see an "oops" page.
- Users logging in or unlocking their devices after some time may see missing messages.
- Users may fail to load messages in channels and chats
- Users are unable to view or download their media (images, videos, audio, call recordings, code snippets)
- Some messages may experience delays being sent
- Call Recordings might take longer to appear in user's OneDrive
- Bots may be unable to download attachments
- Sending and receiving read receipt notifications may be delayed
Current status: Our network and backend service optimization efforts are ongoing and we’re monitoring internal telemetry to confirm that our mitigations are effectively reducing the impact to users. We’re continuing to scale up our services and identify new workstreams intended to remediate this problem more rapidly. Although many users remain impacted by this issue, we’re seeing a reduction in errors and an increase in availability.
Start time: Friday, January 26, 2024, at 2:55 PM UTC
Next update by: Friday, January 26, 2024, at 11:30 PM UTC

Title: Some users may experience multiple issues with their Microsoft Teams
User impact: Users may experience multiple issues with their Microsoft Teams.
More info: Affected scenarios include, but aren't limited to:
- Users performing a cold boot may not able to log into teams and will see an "oops" page.
- Users logging in or unlocking their devices after some time may see missing messages.
- Users may fail to load messages in channels and chats
- Users are unable to view or download their media (images, videos, audio, call recordings, code snippets)
- Some messages may experience delays being sent
- Call Recordings might take longer to appear in user's OneDrive
- Bots may be unable to download attachments
- Sending and receiving read receipt notifications may be delayed
Current status: Our network and backend service optimization efforts are ongoing and we’re monitoring internal telemetry to confirm that our efforts are effectively reducing the impact to users. We’re continuing to scale up our services and identify new workstreams intended to remediate this problem more rapidly. Although many users remain impacted by this issue, we’re seeing a reduction in errors and an increase in availability.
Start time: Friday, January 26, 2024, at 2:55 PM UTC
Next update by: Friday, January 26, 2024, at 11:30 PM UTC

Title: Some users may experience multiple issues with their Microsoft Teams
User impact: Users may experience multiple issues with their Microsoft Teams.
More info: Affected scenarios include, but aren't limited to:
- Users performing a cold boot may not able to log into teams and will see an "oops" page.
- Users logging in or unlocking their devices after some time may see missing messages.
- Users may fail to load messages in channels and chats
- Users are unable to view or download their media (images, videos, audio, call recordings, code snippets)
- Some messages may experience delays being sent
- Call Recordings might take longer to appear in user's OneDrive
- Bots may be unable to download attachments
- Sending and receiving read receipt notifications may be delayed
Current status: Our failover operation did not provide the anticipated relief to end users in North and South America regions and we are now working to optimize traffic patterns as part of the mitigation effort. We’re applying configuration changes across the affected network infrastructure to reduce user impact as quickly as possible.
Next update by: Friday, January 26, 2024, at 11:00 PM UTC

Title: Some users may experience multiple issues with their Microsoft Teams
User impact: Users may experience multiple issues with their Microsoft Teams.
More info: Affected scenarios include, but aren't limited to:
- Users performing a cold boot may not able to log into teams and will see an "oops" page.
- Users logging in or unlocking their devices after some time may see missing messages.
- Users may fail to load messages in channels and chats
- Users are unable to view or download their media (images, videos, audio, call recordings, code snippets)
- Some messages may experience delays being sent
- Call Recordings might take longer to appear in user's OneDrive for Business and SharePoint Online
- Bots may be unable to download attachments
- Sending and receiving read receipt notifications may be delayed
Current status: Our monitoring systems alerted us to an issue where users may experience various impact scenarios in Microsoft Teams, outlined in the More info section above. We've identified that a portion of the Microsoft Teams service is experiencing a networking issue. We've completed a failover in the Europe, Middle East, and Africa (EMEA) region and telemetry is showing improvement. We're continuing work to failover service traffic in all affected regions to remediate impact.
Next update by: Friday, January 26, 2024, at 9:00 PM UTC