Hello, Will the GAL seperation/hiding method found here for Exchange 2007, work for Exchange 2010? I have Exchange 2010 in a forest that has multiple domains and will have more added in the future. I need to keep the Address Lists between users in these domains 100% seperate. They don't need to know the others even exist. Another question, if I do this method and add future users to these domains, will I have to manually go into ADSIedit and change the new user's MSExchQueryBaseDN? I suppose a script could do it, but I don't have much experience writing scripts to change AD/Exchange properties. Thanks!

Currently unsupported. Watch Dave's blog for future info. http://blogs.msdn.com/b/dgoldman/archive/2010/09/09/the-future-of-exchange-2010-address-list-segregation.aspx

Just to add, don't try the 2007 method at all in your 2010 environment as it could destroy your environment, or you could have to tear down and re-install. SteveSteve Goodman Check out my Blog for more Exchange info or find me on Twitter