Users may have not seen sender names in the search results of the Outlook 2016 MSI client.
ID	Workload Feature	Title	Classification	Severity	Start Time	Last Updated
EX989566	Exchange Online Networking Issues Performance degradation	Some users may not see sender names in the search results of the Outlook 2016 MSI client	advisory		15-Jan-2025 07:00	14-Feb-2025 12:03
Update: 14-Feb-2025 12:03 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may have not seen sender names in the search results of the Outlook 2016 MSI client. More Info: Additionally, some users may have seen items in search results displayed as unread. Final Status: We've confirmed that the fix has completed deployment to the impacted infrastructure and validated this has remediated impact using service telemetry. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may have been impacted. Start Time: Wednesday, January 15, 2025, at 12:00 PM UTC End Time: Thursday, February 13, 2025, at 8:00 PM UTC Root Cause: A recent service update contained a code error that prevented search results from loading successfully, resulting in impact. Next Steps: - We're continuing our analysis of the impacting code error to better identify and prevent similar impact in the future. This is the final update for the event. Update: 13-Feb-2025 12:43 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. More Info: Additionally, some users may see items in search results displayed as unread. Current Status: We've verified that the solution is propagating throughout the affected environments, and as it saturates, affected users may experience impact relief. Once available, we'll provide a resolution timeline. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Start Time: Wednesday, January 15, 2025, at 12:00 PM UTC Root Cause: A recent service update contains a code error that's preventing search results from loading successfully, resulting in impact. Next Update By: Friday, February 14, 2025, at 6:30 PM UTC Update: 06-Feb-2025 12:39 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. More Info: Additionally, some users may see items in search results displayed as unread. Current Status: The deployment of the fix is taking longer than initially estimated due to some issues that needed to be addressed that were halting progress. We addressed those issues and have resumed the deployment. We'll aim to provide a timeline for the deployment to complete by our next scheduled communications update. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Start Time: Wednesday, January 15, 2025, at 12:00 PM UTC Root Cause: A recent service update contains a code error that's preventing search results from loading successfully, resulting in impact. Next Update By: Thursday, February 13, 2025, at 7:00 PM UTC Update: 30-Jan-2025 11:28 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. More Info: Additionally, some users may see items in search results displayed as unread. Current Status: We're reverting the code change and applying a fix. Our initial estimate of the deployment progress suggests this should complete by the end of next week. We're monitoring the fix propagation to refine our assessment of when the issue will be fully resolved. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Start Time: Wednesday, January 15, 2025, at 12:00 PM UTC Root Cause: A recent service update contains a code error that's preventing search results from loading successfully, resulting in impact. Next Update By: Thursday, February 6, 2025, at 7:00 PM UTC Update: 29-Jan-2025 12:39 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. More Info: Additionally, some users may see items in search results displayed as unread. Current Status: We've confirmed that reverting the impacting change has remediated the issue in our test environments and are working to initiate the revert more broadly. We expect to have a remediation timeline by the next scheduled update. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Start Time: Wednesday, January 15, 2025, at 12:00 PM UTC Root Cause: A recent service update contains a code error that's preventing search results from loading successfully, resulting in impact. Next Update By: Friday, January 31, 2025, at 7:00 PM UTC Update: 28-Jan-2025 19:52 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. More Info: Additionally, some users may see items in search results displayed as unread. Current Status: We've identified a recent code change through our review of network trace logs that appears to be resulting in impact. We're in the process of reverting this change within our internal testing environment to validate our theory, at which point we will deploy the fix throughout the affected environment. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Next Update By: Wednesday, January 29, 2025, at 7:00 PM UTC Update: 28-Jan-2025 13:54 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. More Info: Additionally, some users may see items in search results displayed as unread. Current Status: We've reproduced the issue within our internal test environment and we're reviewing the reproduction in parallel with the network trace logging to progress our investigation into root cause, which will inform our next steps regarding impact remediation. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Next Update By: Wednesday, January 29, 2025, at 2:00 AM UTC Update: 27-Jan-2025 20:00 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. Current Status: We're continuing to review network trace logs to isolate the source of impact. In parallel, we're attempting to reproduce the issue to aid in the investigating and help us determine our next steps. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Next Update By: Tuesday, January 28, 2025, at 8:00 PM UTC Update: 27-Jan-2025 14:48 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. Current Status: Our investigation into the network trace logs is taking longer than anticipated, but we're continuing to make progress identifying the root cause and strategy that remediates impact. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Next Update By: Tuesday, January 28, 2025, at 2:00 AM UTC Update: 27-Jan-2025 12:51 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. Current Status: We're reviewing network trace logs to determine the root cause and a strategy that remediates impact. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Next Update By: Monday, January 27, 2025, at 8:00 PM UTC Update: 27-Jan-2025 10:44 Title: Some users may not see sender names in the search results of the Outlook 2016 MSI client User Impact: Users may not see sender names in the search results of the Outlook 2016 MSI client. Current Status: We're reviewing support provided information to determine our next troubleshooting steps. Scope of Impact: Some users attempting to search in the Outlook 2016 MSI client may be impacted. Next Update By: Monday, January 27, 2025, at 6:00 PM UTC