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Remove-IPAllowListEntry

Use the Remove-IPAllowListEntry cmdlet to remove IP address entries from the IP Allow list that's used by the Connection Filtering agent on Edge Transport servers. 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
-IdentityThe Identity parameter specifies the integer value of the IP Allow list entry that you want to remove.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-ServerThe Server parameter specifies the Exchange server where you want to run this command.
-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.