CU15

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Issue with Queue Viewer after Exchange 2019 CU15 Upgrade (Hybrid Mode Environment)
Hi everyone, I recently upgraded Exchange 2019 from CU12 SU5 to CU15 in a hybrid environment, and I'm now seeing an issue with Queue Viewer on the upgraded server. When I try to open Queue Viewer from the Exchange Toolbox, I get this error: "Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints." Columns listed in the error: NextHopDomain, DeliveryType, Status, MessageCount, NextRetryTime, LastRetryTime, LastError, Identity, CanSuspend, CanResume, CanRemove, CanForceRetry Environment: .NET Framework version: 528049 OS: Windows 10.0.17763.6414 Exchange 2019 Hybrid (on-prem + Exchange Online) Additional Info: The issue only appears on the CU15-upgraded node Queue Viewer still works fine on a CU12 node From that CU12 node, I can connect to the CU15 node and use Queue Viewer without errors Has anyone seen this before or have any ideas for a fix? Thanks in advance!
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haniamoodi
Apr 30, 2025 Place Exchange
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Issues after Exchange 2019 CU15 install
Hello, We have some issues with our Exchange server. After CU15 install we have high(er) CPU usage at the server and slow(er) Outlook (online no cache mode enabled) connection at the client. MAPI over HTTP and Exchange Extended Protection is enabled. Have anybody else who have the same issues?
Antal_Kabatek
Mar 15, 2025 Place Exchange
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