Dear list; I have some troubles in my exchange 5.5 ... when i try to open exchange administrator, there's error message with the contains "MAPI Called fail" "MAPI or an unspecified service provider. id no: 80004005-0000-00000000" .... I 've tried to fix it with restarting the server, and it's ok now.....but i'm affraid this error will come again, because last week it did. please help me... thanks in advance..... Amos D. Galiardo