I ve installed a rel 6.5 ICS with unified messaging - exchange 2010 without plug-in - works fine

BUT is there a way to get the fucll permission an send as permission to all (or nearly all) mailboxes automaticly ? It' s like a Role-play game if you ve to click user by user an set permissions ....

I am thinking about the powershell commands ... any idea?
thx !!!!
Stef