Classic Outlook search bug leaves moved emails in results as Microsoft prepares fix
Classic Outlook users are experiencing a search bug in which mailbox items that have been moved to other folders remain visible in search results and produce errors when clicked. Microsoft has acknowledged the issue and is working on a fix, though no timeline has been provided. The bug is notable because Microsoft is actively pushing users away from Classic Outlook towards its New Outlook client.
The problem affects Server Assisted Search when using online mode and can also affect messages where categories or read/unread status have been changed. Microsoft's immediate workaround requires a registry change to disable server-assisted searching and revert to Windows Desktop Search. Classic Outlook support continues at least until 2029, but an opt-out phase begins in 2027, after which enterprise users will automatically migrate to New Outlook unless administrators prevent it. Earlier, a separate voicemail attachment access issue was fixed in a recent build.
- Classic Outlook search results show moved messages with no fix timeline.
- Microsoft urges upgrade to New Outlook despite ongoing Classic client bugs.
- Workaround requires Windows Desktop Search registry configuration change.
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Classic Outlook is Microsoft's email client that has been the standard tool for millions of users and organisations for decades. Microsoft is actively encouraging users to switch to its newer New Outlook application, although Classic Outlook will remain officially supported until 2029.
A search malfunction in Classic Outlook is causing emails that have been moved to different folders to continue appearing in search results, but producing errors when clicked. The issue affects searches conducted in online mode and can also occur with emails where the read status or categories have been changed.
Microsoft has confirmed the bug exists and is developing a fix, though no release date has been announced. Until the fix arrives, users can work around the issue by changing a registry setting to disable server-assisted search, though this approach requires technical knowledge.
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Originally published by The Register as “Classic Outlook clings to stale search results as Microsoft works on a fix”.