Guys, got a strange one... User created some sub-folders in Outlook and can access them just fine over MAPI/POP/IMAP but when he goes through OWA and tries to open the folder, he gets a HTTP/1.1 500 Internal Server Error From my research, it seems that it is an Active Sync problem, and he does use a Treo, but we haven't hand any other users experience this issue. Microsoft is completely useless in troublesooting the problem as they generalize this error and claim that it can mean either problem A,B,C,D,E,F,G,H,I,J,K,L,M,N,O or your mother. Love it. Any ideas? Thanks!