I have found a solution for a logon problem with OWA which is not listed in
the knowledge base.
We had the problem that some users could use OWA, while others could not.
Everyone tells me that is had to do with security rights, but those rights
where the same for all users.
The solution is as follow. I can best explain it with an example:
domain called "microsoft.nl"
All users within this domain need an e-mail address like
This does not have to be their primary address.
Most likely, some users have a different primary address, but in order to
make OWA work for those users, they need a secondary e-mail address with the