CmdID

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Remove-TenantAllowBlockListSpoofItems

Use the Remove-TenantAllowBlockListSpoofItems cmdlet to remove spoofed sender entries from the Tenant Allow/Block List. Exchange PowerShell reference

From the Exchange PowerShell reference 4 parameters Its page in the reference

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Parameters

4 in the Exchange PowerShell reference
-IdentityUse the value domain.com\Default for this parameter.
-IdsThe Ids parameter specifies the spoof pair that you want to remove.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-WhatIf, -wiThis parameter is reserved for internal Microsoft use.