Out-of-date- connecting on-premises exchange servers

[chapter7]

Hi

I am getting issues with sending emails. Please find snapshots. I have done Pause Enforcement for 10 days. It is working fine now but I need permanent solutions.

 

[#2]

What version of Exchange Server are you using onprem?

[#3]

Exchange Server 2016 CU19 (15.1.2176.14)

[#4]

You need to install the most current Exchange Server CU to be updated.

See more here: https://techcommunity.microsoft.com/t5/exchange-team-blog/update-on-transport-enforcement-system-in-...

You can find the CU here: https://support.microsoft.com/en-us/topic/cumulative-update-23-for-exchange-server-2016-kb5011155-98...
Warning: patching an old Exchange Server may result in a very bad day, so prepare and make sure to do it when you have the time for troubleshooting, if something goes wrong.

Kind regards Thomas.