In April 2022, Microsoft released the latest CU for both Exchange 2016 (CU 23) and Exchange 2019 (CU 12). Microsoft have the release notes for both of these in the links below if you care to read them. Exchange 2016 CU 23 Exchange 2019 CU 12 With it came one minor but potentially troubling change if you are not aware of it. You see Microsoft changed the command line … [Read more...]
Exchange Bug Stops Mail Delivery in 2022
A little like the Y2K bug, it's been found that Microsoft have a bug in their malware filtering service that is part of Exchange 2016 and later that only started at midnight on Jan 1st 2022. The effect of this bug is that mail delivery stops entirely IF the Malware scanning filter is being used (which by default it is). Here's a sample of some of the messages you would have … [Read more...]