Increase WinRM / PowerShell Limits

For many organisations, PowerShell remoting is done through a scripthost server where maximum concurrent session limits and maximum connected user limits can be reached. As explained in this Microsoft blog, the following error might be encountered.

PS> New-PSSession
[localhost] Connecting to remote server failed with the following error message : The WS-Management service cannot process the request. This user is allowed a maximum number of 5 concurrent shells, which has been exceeded. Close existing shells or raise the quota for this user. For more information, see the about_Remote_Troubleshooting Help topic.
+ CategoryInfo          : OpenError: (System.Manageme….RemoteRunspa
ce:RemoteRunspace) [], PSRemotingTransportException
+ FullyQualifiedErrorId : PSSessionOpenFailed

Open a PowerShell session and run the following commands to get the current config.

Run the command below to increase the number of maximum shells per user

Run the command below to set the maximum number of concurrent users

Check the configurations have been updated

For the configurations changed above, I would recommend a minimum of 2 vCPU and 4 GB Memory.

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