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WinRM test failed – Unable to load assembly "-"specified in "InitializationParameters" section.
All SAM versions
Open PowerShell session in Administrator context.
To view the existing InitializationParameters configuration, type:
Get-ChildItem -Path wsman:\localhost\plugin\microsoft.powershell\InitializationParameters
To remove the assemblyname value, type:
Remove-Item -Path wsman:\localhost\plugin\microsoft.powershell\InitializationParameters\assemblyname
To remove the pssessionconfigurationtypename value, type:
Remove-Item -Path wsman:\localhost\plugin\microsoft.powershell\InitializationParameters\pssessionconfigurationtypename
To restart WinRM service, type the following in a command prompt run in the Administrator context
sc stop WinRM
sc query WinRM
sc start WinRM
If the Configure Serve' button continues to fail with the same error, reboot the Exchange server during the next maintenance window and try again.