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Add-IPAllowListEntry

Use the Add-IPAllowListEntry cmdlet to add IP Allow list entries to the IP Allow list that's used by the Connection Filtering agent on Edge Transport servers. Exchange PowerShell reference

From the Exchange PowerShell reference 7 parameters Its page in the reference

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Parameters

7 in the Exchange PowerShell reference
-IPAddressThe IPAddress parameter specifies a single IP address to add to the IP Allow list, for example, 192.168.0.1.
-IPRangeThe IPRange parameter specifies a range of IP addresses to add to the IP Allow list.
-CommentThe Comment parameter specifies an optional comment.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-ExpirationTimeThe ExpirationTime parameter specifies a day and time when the IP Allow list entry expires.
-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.