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.
1PS> cd WSMan:\localhost\Shell 2PS> dir
Run the command below to increase the number of maximum shells per user
1PS> Set-Item .\MaxShellsPerUser 120
Run the command below to set the maximum number of concurrent users
1PS> Set-Item .\MaxConcurrentUsers 100
Check the configurations have been updated
For the configurations changed above, I would recommend a minimum of 2 vCPU and 4 GB Memory.