Folks, We are getting a problem adding additional mailboxes to a MAPI profile for users who do not have administrative rights in an Exchange 5.5 directory. This seems to date from the point where we introduced our first Exchange 2003 server into our mixed mode Exchange organisation. The solution in this knowledge base article (833399) works but the problem is not as described in the article. Has anyone met issues like this and found an underlying cause or resolution. Whilst we can apply the 833399 resolution on PCs we cannot on MACs which seem to suffer a variant of this problem where the user cannot connect his mailbox at all when creating a new profile. It is again circumventable by logging in with Admin credentials but does not survive logging off Outlook. Regards, Roger Mackenzie (Glasgow University)