MSMQ - Add user privileges to queues via PowerShell

In PowerShell, the Set-MsmqQueueACL cmdlet can be used to modify the access rights of queues.

Sample - Add "FullControl" permission to user for all queues of type "Private":

Get-MsmqQueue -QueueType Private | Set-MsmqQueueAcl -UserName "domain\username" -Allow FullControl

Reference: https://docs.microsoft.com/en-us/powershell/module/msmq/set-msmqqueueacl