has anybody seen this problem before i have started to migrate my mail server 5.5 to exch 2k3 with adc i have some users in 5.5 and some in 2k3 my problem is that as admin i can open 5.5 user mailbox from outlook but users that are in exch-2k3 server i can not and users that are on the 2003 server cannot create rules the get a error rules can not be upgraded the sever might be out of space can anybody help thanks in advance