Microsoft has released Security Updates (SUs) for vulnerabilities found in:
Exchange Server 2019
Exchange Server 2016
SUs are available for the following specific versions of Exchange Serve...
Updated Nov 27, 2023
Version 8.0
Blog Post
Any word on when the bug is going to be fixed? LukasSMSFT
We also have issues now after the update, where if someone has an on-prem shared mailbox mapped, they can't search it.