Dear All,Im pretty sure that its a simples question but here we go.Some distribution groups apears to me in blue, that one i can modify the group members, but the other ones in gray, i cant.How can i modify that ones ?Guilherme Teles

Where are you referring to? Within Outlook, Exchange Management Console, Active Directory Users and Computers, somewhere else? Mike Crowley: MCT, MCSE, MCTS, MCITP: Enterprise Administrator / Messaging Administrator

Hi Guilherme,Because groups with gray color are non-Universal groups, Exchange 2007 supports only universal group to be mail-enabled.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=299You need to convert Global/Local group to Universal Group, you can use below command to convert all Global groups to Universal (I would suggest you to simulate this in test lab first).Get-DistributionGroup | where { $_.Grouptype -Like "Global*" } | Set-Group UniversalReference: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 Amit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com