Microsoft has released Security Updates (SUs) for vulnerabilities found in:
Exchange Server Subscription Edition (SE)
Exchange Server 2019
Exchange Server 2016
SUs are available for the f...
Updated Feb 13, 2026
Version 3.0
Blog Post
Hello, after installing the Exchange SE SU, I can no longer connect to the shell. What can I do?
New-PSSession : [ex08.domain.com] Beim Verbinden mit dem Remoteserver "ex08.domain.com" ist folgender Fehler
aufgetreten: Weitere Informationen finden Sie im Hilfethema "about_Remote_Troubleshooting".
In Zeile:1 Zeichen:1
+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Micr ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin
gTransportException
+ FullyQualifiedErrorId : -2144108477,PSSessionOpenFailed
Update:
I was able to resolve the issue by opening IIS Manager, navigating to Exchange Back End, assigning the SSL certificate to port 444, and restarting the website.