CmdID

CmdID / PowerShell / Cmdlets / Get

Get-BlockedSenderAddress

Use the Get-BlockedSenderAddress cmdlet to view users in your Microsoft 365 organization that are affected by the protection system. Exchange PowerShell reference

From the Exchange PowerShell reference 1 parameter Its page in the reference

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Parameters

1 in the Exchange PowerShell reference
-SenderAddressThe SenderAddress parameter filters the results by the email address of the blocked user.