We are running Exchange 2003 and Outlook 2007. One of our users is sharing
her calendar and would like others to be able to post to it.

She has invited the others to her calendar as reviewers and they are able to
see her calendar. When I change the permissions from reviewers to
contributors or custom the others can no longer get the data from her
calendar. They only see a blank calendar.

In order to see the calendar information again I had to delete the users and
recreate the calendar share as a reviewer. I also tried setting up the
others manually by going into the properties of the calendar and adding them.
However, I can only get this to work if they are reviewers Others groups of
users on our network are able to do this with no problems.

I would appreciate any suggestions as to why this is happening. Thank you.