Microsoft has released Security Updates (SUs) for vulnerabilities found in:
Exchange Server 2013
Exchange Server 2016
Exchange Server 2019
SUs are available in a self-extracting auto-elev...
Updated Mar 03, 2023
Version 13.0
Blog Post
Updated manually 2 servers with Exchange 2016 CU23 + Jan23SU:
1. HealthChecker.ps1 shows version .21
2. EAC show .17 for 1 server and .18 for another. 2 reinstall didn't change anything.
3. Get-HealthReport shows only Monitoring Unhealthy
4. Application logs full of errors on both servers
An unhandled exception occurred and the process was terminated.
Application ID: /LM/W3SVC/2/ROOT/EWS
Process ID: 34516
Exception: Microsoft.Exchange.Diagnostics.BlockedDeserializeTypeException
Message: Deserialization of type System.MarshalByRefObject blocked due to InDeny at location ClientExtensionCollectionFormatter.
5. Server-side search in Outlook is broken.
6. Scheduling assistant "think" 20-30 seconds before display calendars (before update it was immediate, system is on SSD).
7. Edit add-ins in OWA broken too...
"Great" work, MS 😞
How to fix this mess?