Hello,I just want to know how could I backup the IPs I have added in the IP allow list ??Thanks in advance.

You could use the Get-IPAllowListEntry cmdlet and export the results to a file, etc. Don't forget that, if this is on an Edge Transport server, you can also export the entire Edge configuration via the ExportEdgeConfig PowerShell script supplied with Exchange.Neil Hobson, Exchange MVP

thanks NeilTo export the Ip list to a file, Should I run Get-IPAllowListEntry | Export-Csv -Path c:\tmp\IPs.csv ??Once my IPlist is exported how do I restore the list if I need to?

If you run the export command above, you'll get loads of extra data that you're probably not interested in like the expiration time, etc. Seeing as you're probably only interested in the actual IP addresses (which is the 'IPRange' field), you could run this command:Get-IPAllowListEntry | Select IPRange | Export-Csv c:\ips.csvTo import them in later, you could run the following commands:$IPList = Import-Csv c:\ips.csvForEach ($SingleIP in $IPList) {Add-IPAllowListEntry -IPRange $SingleIP.IPRange}Test in your lab though! :)Neil Hobson, Exchange MVP

Perfect!! thanks a lot Neil :-D it answers completely my question!!