Users may be unable to load themes in Outlook on the web

Title: Users may be unable to load themes in Outlook on the web User impact: Users may be unable to load themes in Outlook on the web. Current status: We've received confirmation from some affected users that impact is resolved. We're reaching out to additional impacted users to confirm that the issue is fully resolved. Scope of impact: Impact is specific to users attempting to load themes in Outlook on the web. This information may be updated as our investigation continues. Next update by: Friday, September 4, 2026, at 3:00 AM UTC

Title: Users may be unable to load themes in Outlook on the web User impact: Users may be unable to load themes in Outlook on the web. Current status: We've rolled back a recent authentication related change that we suspect is contributing to the impact. We're reaching out to affected users to confirm whether our mitigative action has resolved this issue, which will also aid in confirming our root cause theory. Scope of impact: Impact is specific to users attempting to load themes in Outlook on the web. This information may be updated as our investigation continues. Next update by: Thursday, September 3, 2026, at 9:00 AM UTC

Title: Users may be unable to load themes in Outlook on the web User impact: Users may be unable to load themes in Outlook on the web. Current status: Our investigation of the web startup process issue is still ongoing to further isolate the reason for the impact and help us determine the next steps to remediate the impact. Scope of impact: Impact is specific to users attempting to load themes in Outlook on the web. This information may be updated as our investigation continues. Next update by: Thursday, September 3, 2026, at 2:00 AM UTC

Title: Users may be unable to load themes in Outlook on the web User impact: Users may be unable to load themes in Outlook on the web. Current status: We're continuing to review our service side logs to gather more information regarding the web startup process issue and determine why it's preventing the themes from loading, so that we can developed a mitigation strategy. Scope of impact: Impact is specific to users attempting to load themes in Outlook on the web. This information may be updated as our investigation continues. Next update by: Wednesday, September 2, 2026, at 10:30 PM UTC

Title: Users may be unable to load themes in Outlook on the web User impact: Users may be unable to load themes in Outlook on the web. Current status: We've identified an issue occurring during the Outlook on the web startup process that's preventing themes from loading as expected. We're reviewing system logs to understand what is causing the behavior, which will help us isolate our next steps toward remediation. Scope of impact: Impact is specific to users attempting to load themes in Outlook on the web. This information may be updated as our investigation continues. Next update by: Wednesday, September 2, 2026, at 8:30 PM UTC