CmdID / PowerShell / Cmdlets / Add
Add-eDiscoveryCaseAdmin
Use the Add-eDiscoveryCaseAdmin cmdlet to add an eDiscovery Administrator in the Microsoft Purview compliance portal. Exchange PowerShell reference
From the Exchange PowerShell reference 3 parameters Its page in the reference
Parameters
-UserThe User parameter specifies the user that you want to add to the list of eDiscovery Administrators.-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.-WhatIf, -wiThe WhatIf switch doesn't work in Security & Compliance PowerShell.