CmdID

CmdID / PowerShell / Cmdlets / Set

Set-CsPhoneNumberAssignmentBlock

This cmdlet allows the admin to create and assign a temporary block on telephone number assignment to selected telephone number. Microsoft Teams PowerShell reference

From the Microsoft Teams PowerShell reference 3 parameters Its page in the reference

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Parameters

3 in the Microsoft Teams PowerShell reference
-TelephoneNumberIndicates the phone number for the assignment block to be assigned.
-AssignmentBlockedForeverSets an indefinite block on assignment for the telephone number.
-AssignmentBlockedDaysSets a duration based assignment block on the telephone number.