October Windows Server updates break Exchange sign-in and mail flow
A new 512-call Endpoint Mapper limit can stall OWA and delivery; Microsoft offers a registry workaround, not an uninstall.
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Product
Outlook on the web
- Mentions · 7d1
- Mentions · 30d2
- All mentions2
- First seenOct 6, 2026
- Last mentioned6d ago
Timeline
2 articles · newest firstMicrosoft extends the Outlook naughty step with two more file types
Microsoft will block .msix and .msixbundle attachments in New Outlook for Windows and Outlook on the web.
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Appears with
- Microsoftvendor · 2
- Windows Serverproduct · 1
- Exchange Serverproduct · 1
- Microsoftorganization · 1
- Exchange Onlineproduct · 1
- New Outlook for Windowsproduct · 1
- Outlookproduct · 1
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