Exchange 2019 WAS Id 5011

fegume xx 6 Reputation points


We have issue with out Cluster DAG Exchange 2019, randomly, the node is lock and OWA and client outlook cannot connect.
The server is lock, no RDP and KVM connection (reset force) then the service be back ok.

We see this error172217-error-exchange.png

The schannel no problem, but if think the issue is with WAS ID 5011. MSExchangeRpcProxyAppPool, MsExchangeOABAppPool,MSExchangeMapiMailboxAppPool, etc...

S.O Windows 2019 and exchange version is 2019 C11 U3 .

I see this web:, but we haven´t Exchange Web Services Managed API 2.2.

Any idea?

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. fegume xx 6 Reputation points

    Hello, I think that all right. We remove the Microsoft Web Platform Installer 5.1 on both nodes and I think that fix it.


    1 person found this answer helpful.

  2. fegume xx 6 Reputation points

    Hello KaelYao-MSFT ,

    Don't have any Event 15004-15007.

    We use Cytomic Antivirus and Veeam backup as third-party software, but I can't see if this software is the problem, because then the issue start, the node is all locked and I cannot login for review it.


  3. fegume xx 6 Reputation points

    Hello again.

    Today the error came back :(

    the same problem. Any idea?


    0 comments No comments

  4. fegume xx 6 Reputation points

    Hello today again failed. new errors:

    any idea??

    0 comments No comments