Active Directory and Exchange User Group Portugal
http://www.gupade.org/

Exchange MVP's - Microsoft Most Valued Professionals
http://mvp.support.microsoft.com/

Exchange User Group Croatia
http://www.eugcro.org

Exchange User Group France
http://exchange.microsoftgroups.org/default.aspx

Exchange User Group Italy
http://www.ugimex.org/

Exchange User Group Slovenia
http://www.sloeug.org

Korean Exchange User Group
http://www.exchange.or.kr

Microsoft Exchange Server and Small Business Server User Groups directory
http://www.microsoft.com/exchange/community/usergroups.mspx

Singapore Windows and Exchange User Group
http://sgwindowsgroup.org/CommunityServer/

UK Exchange Server Professionals group
http://www.ukesp.org