Hi folks wonder if you can advise. We have a customer with an Exchange 2k box with all the correct as advised raid setup etc and exactly 1 gb ram on a w2k advanced server that is the active directory root ! Performance bottlenecks during the middle of the day and reaction time at the console can sometimes drag. Based on reviews and visits to exchange support groups our plan is to: Reintsall the local nav as unmanaged and allow it to perform its own updates. might help. (av for exchange is running fine) Moving user directories and other data from this server to a file server. i'm sure this will help the server. adding the /3gb switch to the boot.ini as recommended by ms due to w2k advanced server and 1gb ram on server. will this help. Have you seen it's influence anywhere ? or will there be adverse effects on ad logins etc. Active directory root etc is on server-we are thinking of moving roles to another server. Will this make any impact on performance ? (Rhetorical question ?) what we've already done: Changed the realtime protection of symantec anti virus to not monitor exchange directories etc as recommended by symantec Checked symantec av for exchange is uptodate and updating. looking good. any advise is appreciated. thanks duggy