Released: January 2022 Exchange Server Security Updates

The_Exchange_Team Nino_Bilic  Hi Team.  We've rolled out this security update over the last week across 4 unique Exchange 2016 environments and all 4 are now having an issue when trying to edit any DAG network settings (such as changing the name, adding/removing a subnet or enabling compression/encryption).  The error is shown below:

"A server-wide administrative operation has failed.  Operation failed with message: Error 0xe0434352 (Unknown error from cli_SetDagNetwork"

This prevents us changing any network settings on the DAG.  I've isolated the problem down to it being the Jan 2022 security update by following this process:

• Stood up new Exchange 2016 CU21 server in the existing org and created test DAG with this server as the only member.
• Updated network settings without issue.
• Upgraded to CU22.
• Updated network settings without issue.
• Applied January 2022 security update.
• Not able to update network settings with error.
• Uninstalled January 2022 security update.
• Updated network settings without issue.
• Applied November 2021 security update.
• Updated network settings without issue.
• Re-applied January 2022 update.
• Now unable to update settings again.

Do you have any known issues other than those currently documented?  As I said, I have this problem across 4 independent environments and I've also re-created in an external lab.  I'm not seeing any events logged when this happens other than the generalised cmdlet failed error.

Thanks