Users may be unable to access archived email messages in Outlook on the web

Title: Users may be unable to access archived email messages in Outlook on the web User impact: Users may be unable to access archived email messages in Outlook on the web. Final status: We've validated the fix has completed deployment to all affected environments. However, users that reported the issue haven't responded to validate that our corrective actions resolved the issue. In the event impact persists, please contact one of our support representatives so we can continue our investigation into the problem. Scope of impact: Impact is specific to some users attempting to access archived email messages in Outlook on the web. Start time: Tuesday, March 24, 2026, at 9:37 AM UTC Root cause: A code issue is resulting in restricted access when archiving email messages in Outlook on the web. The primary and archive mailboxes are on different machines, the request to access the mailbox is landing in the correct portion of infrastructure but is trying to find the primary instead of the archive mailbox, resulting in impact. This is the final update for the event.

Title: Users may be unable to access archived email messages in Outlook on the web User impact: Users may be unable to access archived email messages in Outlook on the web. More info: When affected users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: We've confirmed the fix has completed releasing to all affected infrastructure and are monitoring the environment to validate this issue has been remediated. Scope of impact: Impact is specific to some users attempting to access archived email messages in Outlook on the web. This section may be updated as our investigation continues. Start time: Tuesday, March 24, 2026, at 9:37 AM UTC Root cause: A code issue is resulting in restricted access when archiving email messages in Outlook on the web. The primary and archive mailboxes are on different machines, the request to access the mailbox is landing in the correct portion of infrastructure but is trying to find the primary instead of the archive mailbox, resulting in impact. Next update by: Tuesday, April 14, 2026, at 5:30 PM UTC

Title: Users may be unable to access archived email messages in Outlook on the web User impact: Users may be unable to access archived email messages in Outlook on the web. More info: When affected users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: While deployment has completed in some affected environments, additional time is required to deploy the fix across the remaining impacted areas. We expect deployment to complete by Monday, April 13, 2026. In parallel, we’re reaching out to a sample of impacted users to confirm whether issue has been mitigated. Scope of impact: Impact is specific to some users attempting to access archived email messages in Outlook on the web. This section may be updated as our investigation continues. Estimated time to resolve: Monday, April 13, 2026 Root cause: A code issue is resulting in restricted access when archiving email messages in Outlook on the web. The primary and archive mailboxes are on different machines, the request to access the mailbox is landing in the correct portion of infrastructure but is trying to find the primary instead of the archive mailbox, resulting in impact. Next update by: Monday, April 13, 2026, at 3:00 PM UTC

Title: Users are unable to access archived email messages in Outlook on the web User impact: Users are unable to access archived email messages in Outlook on the web. More info: When users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: The fix deployment has completed and has fully saturated throughout the affected environment. We're checking with your organization now to confirm whether impact has been fully resolved. Scope of impact: Your organization is affected by this event, and some users attempting to access archived email messages in Outlook on the web are impacted. This section may be updated as our investigation continues. Root cause: A code issue is resulting in restricted access when archiving email messages in Outlook on the web. The primary and archive mailboxes are on different machines, the request to access the mailbox is landing in the correct portion of infrastructure but is trying to find the primary instead of the archive mailbox, resulting in impact. Next update by: Monday, April 6, 2026, at 3:00 PM UTC

Title: Users are unable to access archived email messages in Outlook on the web User impact: Users are unable to access archived email messages in Outlook on the web. More info: When users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: We’re continuing to monitor the service health telemetry as our fix deployment continually saturates throughout the affected environment. Additionally, we anticipate that this process will be completed prior to our next scheduled update, at which point we aim to verify with your representatives that impact has been remediated. Scope of impact: Your organization is affected by this event, and some users attempting to access archived email messages in Outlook on the web are impacted. This section may be updated as our investigation continues. Root cause: A code issue is resulting in restricted access when archiving email messages in Outlook on the web. The primary and archive mailboxes are on different machines, the request to access the mailbox is landing in the correct portion of infrastructure but is trying to find the primary instead of the archive mailbox, resulting in impact. Next update by: Monday, April 6, 2026, at 6:30 AM UTC

Title: Users are unable to access archived email messages in Outlook on the web User impact: Users are unable to access archived email messages in Outlook on the web. More info: When users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: We've implemented a code change, we anticipate this will take approximately a week to complete. We're monitoring service health telemetry as it progresses to verify the issue is resolved. Scope of impact: Your organization is affected by this event, and some users attempting to access archived email messages in Outlook on the web are impacted. This section may be updated as our investigation continues. Root cause: A code issue is resulting in restricted access when archiving email messages in Outlook on the web. The primary and archive mailboxes are on different machines, the request to access the mailbox is landing in the correct portion of infrastructure but is trying to find the primary instead of the archive mailbox, resulting in impact. Next update by: Friday, April 3, 2026, at 6:30 AM UTC

Title: Users are unable to access archived email messages in Outlook on the web User impact: Users are unable to access archived email messages in Outlook on the web. More info: When users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: We've identified a code issue that is resulting in restricted access to archived email messages. We're implementing a code change and going to monitor the service health telemetry to verify if the issue is resolved. Scope of impact: Your organization is affected by this event, and some users attempting to access archived email messages in Outlook on the web are impacted. This section may be updated as our investigation continues. Root cause: A code issue is resulting in restricted access when archiving email messages in Outlook on the web. The primary and archive mailboxes are on different machines, the request to access the mailbox is landing in the correct portion of infrastructure but is trying to find the primary instead of the archive mailbox, resulting in impact. Next update by: Thursday, March 26, 2026, at 7:30 AM UTC

Title: Users are unable to access archived email messages in Outlook on the web User impact: Users are unable to access archived email messages in Outlook on the web. More info: When users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: Our investigation of the HAR logs, service logs, and mailbox move history has been so far inconclusive. We're gathering infrastructure logs to aid in our investigation of the root cause and a strategy that remediates impact. Scope of impact: Your organization is affected by this event, and some users attempting to access archived email messages in Outlook on the web are impacted. This section may be updated as our investigation continues. Next update by: Wednesday, March 25, 2026, at 12:00 AM UTC

Title: Users are unable to access archived email messages in Outlook on the web User impact: Users are unable to access archived email messages in Outlook on the web. More info: When users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: We're continuing to review service logs and HAR network trace logs to identify the root cause and a strategy that remediates impact. In addition, we're reviewing mailbox move history to determine if this may be preventing access to the archived mailboxes. Scope of impact: Your organization is affected by this event, and some users attempting to access archived email messages in Outlook on the web are impacted. This section may be updated as our investigation continues. Next update by: Tuesday, March 24, 2026, at 9:00 PM UTC

Title: Users are unable to access archived email messages in Outlook on the web User impact: Users are unable to access archived email messages in Outlook on the web. More info: When users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: We're reviewing service logs and continuing our analysis of the HAR network trace logs to identify why requests aren't being processed as expected, and to refine our understanding of the underlying issue to help mitigate impact. Scope of impact: Your organization is affected by this event, and some users attempting to access archived email messages in Outlook on the web are impacted. This section may be updated as our investigation continues. Next update by: Tuesday, March 24, 2026, at 7:00 PM UTC

Title: Users are unable to access archived email messages in Outlook on the web User impact: Users are unable to access archived email messages in Outlook on the web. More info: When users try to access archived email messages in Outlook on the web, they may see the error message “Your message cannot be displayed right now.” Current status: We're reviewing HTTP Archive format (HAR) network trace logs to help identify the root cause of the event, so we can determine our next troubleshooting steps. Scope of impact: Your organization is affected by this event, and some users attempting to access archived email messages in Outlook on the web are impacted. This section may be updated as our investigation continues. Next update by: Tuesday, March 24, 2026, at 1:00 PM UTC