PROBELEM: My Domain A is in the HO and My Domain b is whre i am. We have installed an Exchnage server at HO and Domain B both are designated bridge heads connecting and exchanging messages via PSTN dial up. The conern is when my Exch 5.5 dials up to Domain A (HO) it maeks all of my outlook client hangs. Busy...cant retrieve mail, senb mail and the global address book is not available. More you cant even ping the PDC where Exch 5.5 also exist. I know this is a bad implementation but just the same can i do anytihng to loosen up this problem. This is not a good. sign. Imagine if someone send mail at 2MB size my Exch will dial and till it has not retrieve and send the 2MB message everyhting on my domain -- Outlook client that is freezes. and in the event that someone is trying to log on to the PDC he can't because the server is busy and cant function properly as Master browser. Pls a littel help. George