Your reliable tool for approving and testing Windows updates.
KB Details - KB5131085
KB5131085
Important
⚠️ Yes
Title
November 10, 2026—KB5131085 (OS Build 17763.9487) | Microsoft Support
Severity
Important
Known Issues
⚠️ Yes
Known Issues Count
1
Release Date
2026-11-10
OS Builds
17763.9487
Known Issues Details
#1 - N/A Status: N/A Symptoms: Users might be unable to sign in to Outlook on the web (OWA), or email messages sent from Outlook might remain in the Outbox and not be delivered. Additionally, Exchange might experience issues accessing mailboxes during mailbox replication. Workaround: N/A Affected: N/A
Description
[N/A] Users might be unable to sign in to OWA or send emails on Exchange Server. After installing this update, some on-premises Exchange servers might experience issues accessing or sending email. Users might be unable to sign in to Outlook on the web (OWA), or email messages sent from Outlook might remain in the Outbox and not be delivered.