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MSExchangeMapiMailboxAppPool causes prolonged 100% CPU in Exchange Server 2019 and 2016

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Symptoms

In Microsoft Exchange Server 2019 and Exchange Server 2016, threads of MSExchangeMapiMailboxAppPool are stuck in lock contention (clr!AwareLock::Contention), which causes the affected server to stop responding with 100% CPU usage for a long time (1+ hour).

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Resolution

To fix this issue, install one of the following updates:

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References

Learn about the terminology that Microsoft uses to describe software updates.

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Keywords: CI122123, kbHotfixAuto, msexchangemapimailboxapppool causes 100 percent CPU usgae, kbqfe, kbfix, kb

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Article Info
Article ID : 4570254
Revision : 5
Created on : 9/15/2020
Published on : 9/15/2020
Exists online : False
Views : 163