Exchange Connector: Failed to poll the inbox at https://outlook.office365.com/EWS/Exchange.asmx for new mail, details: The request failed. The underlying connection was closed:

Roberto Castaneda 16

Exchange Connector: Unable to process email for username@test .com, message=The request failed. The underlying connection was closed: An unexpected error occurred on a send.

Nothing has changed this morning but it just stopped at 8am today.

David Spencer 1 Reputation point

2022-02-24T20:57:22.043+00:00

Also running into this issue in my environment. Just started this morning, nothing has changed on our end, were you able to resolve this?
Emily Hua-MSFT 27,641 Reputation points

2022-02-25T01:21:00.01+00:00

Hi @Roberto Castaneda
As the tag "office-online-server-exchange" is more related to OOS, but your issue is more related to Exchange, I would modify the tag.
Thanks for your understanding.

1 answer

K, Ben 6 Reputation points

2022-02-24T22:04:02.54+00:00

Same in my environment. Seems to be fixed by these registry keys:

Add reg keys into your SCSM Server:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft.NETFramework\v4.0.30319]

"SystemDefaultTlsVersions"=dword:00000001

and

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft.NETFramework\v4.0.30319]

"SystemDefaultTlsVersions"=dword:00000001

Restart the server.
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1 person found this answer helpful.
David Spencer 1 Reputation point

2022-02-24T22:11:41.263+00:00

I was just looking to add the same keys in an attempt to resolve, and while I was doing that - it started working again (I didnt change anything).

Wayne Peinke 1 Reputation point

2022-03-14T15:10:27.487+00:00

I had this same issue and the reg key fixed it, thanks. Any idea what the root cause is though?

Chris.Pierce 101 Reputation points

2022-03-16T17:54:20.773+00:00

This morning I noticed several identical events (as above) in the Ops Manager event log on my SCSM 2019 management server.

Emails weren't being processed in SCSM 2019 via the Exchange Connector for approximately 90 minutes, and then it suddenly started working again. Weird.

I will try adding these registry keys in an attempt to keep this from happening in the future.

Felix Brusch 1 Reputation point

2022-03-22T08:40:36.403+00:00

This worked for me, may i ask how you arrived at this solution?
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Exchange Connector: Failed to poll the inbox at https://outlook.office365.com/EWS/Exchange.asmx for new mail, details: The request failed. The underlying connection was closed:

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