Symptoms
In a Microsoft Exchange Server 2016 environment, after you uninstall Windows PowerShell version 2.0 and install a later version of PowerShell instead, the Exchange Management Shell can't be opened successfully, and you receive the following error message:
New-PSSession: [ServerName] Processing data from remote server ServerName failed with the following error message: [ClientAccessServer=ServerName,BackEndServer=ServerName,RequestId=RequestId,TimeStamp=DateTime] [AuthZRequestId=AuthZRequestId][FailureCategory=AuthZ-SetupVersionInformationCorruptException] Unable to determine the installed file version from the registry key 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PowerShell\1\PowerShellEngine'. For more information, see the about_Remote_Troubleshooting Help topic. At line:1 char:1 + New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Micr ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin gTransportException + FullyQualifiedErrorId : IncorrectProtocolVersion,PSSessionOpenFailed
The following event log entry is also logged:
Log Name: Application Source: MSExchange RBAC Date: DateTime Event ID: 258 Task Category: RBAC Level: Error Keywords: Classic User: N/A Computer: ComputerName Description: (Process 8820, PID w3wp.exe)"RemotePS Public API Func GetApplicationPrivateData throws Exception Microsoft.Exchange.Diagnostics.SetupVersionInformationCorruptException: Unable to determine the installed file version from the registry key 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PowerShell\1\PowerShellEngine'.
Cause
This issue occurs because the registry path of the later version of PowerShell is changed.
Workaround
You can add the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PowerShell\1\PowerShellEngine registry key back after you uninstall Windows PowerShell 2.0. The quickest way is to grab the registry file from the Microsoft TechNet Gallery: https://gallery.technet.microsoft.com/Exchange-2016-CU1-7c843cb0.
Resolution
To fix this issue, install Cumulative Update 9 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.
