Anyone knows how to fix this:
After using MS article 316886 as a template to move mailbox from
Exchange 5.5 to Exchange 2003, the Outlook client won't connect. I get
an error message that says "The bookmark is not valid". If I do OK, I
get into the properties page where I can put the server name and my
user. If I do Check Name I receive this "The name could not be
resolved. The bookmark is invalid." OWA works fine.
No clients can connect. They all receive the same error.
I was able to connect with Outlook when both servers (5.5 and 2003)
were alive. It seems to have happened after the removal of 5.5.