We just installed Exchange 2007 sp1 - Is there at tool or utility that will convert all the existing non-universal distribution groups or do we need to go group by group? How does converting these to 2007 groups impact the existing 2003 Exchange environment? -John

Hello John, Thumb rule, Exchange 2007 supports only universal group to be mail-enabled but Exchange 2003 does so there wouldnt be any impact on legacy Exchange version (2003) since it supports both type. Here is a nice discussion and repo about it, for your reference. Only Universal Groups can be Mail-Enabled in Exchange 2007, Or Not? http://www.pro-exchange.be/modules.php?name=News&file=print&sid=299 Now to convert Global/Local group to Universal Group, you can use Quest PowerShell tools or once you introduce Exchange 2007 in your environment you can use below command to convert all Global group to Universal (I would suggest you to simulate this in test lab first). Get-DistributionGroup | where { $_.Grouptype -Like "Global*" } | Set-Group Universal Reference: Need to convert Global groups to Universal groups? http://blogs.technet.com/sfodel/archive/2008/08/04/need-to-convert-global-groups-to-universal-groups.aspx

http://www.pro-exchange.be/modules.php?name=News&file=print&sid=299 above link is not working