All calendars appear to be shared for all users

[Guest]

I have been reading a lot of cases where people are having difficulty in
sharing their calendars in Outlook. We are having the exact opposite problem.
It appears that everyone in our organization can open everyone else’s
calendar as a shared calendar, and even make changes! The only way to prevent
changes is to make an event a private item. None of the users checked has
opted to share their calendar to more than one or two people and some do not
share to anyone (the permission is set at default with none as permissions.)
I even created a test user with no rights other than domain user and the test
user could open my calendar, which was set as default with no permissions.
The test user was using Outlook 2000. I have Outlook 2003 SP2.

Our environment is: Exchange 2003 SP2 (clustered), Outlook 2003, SP2 on down
to Outlook 2000, Windows 2003 hybrid domain with about 3500 users. Because of
our hybrid domain, we do not have any group policies in place except for the
default.

I am thinking that this is a permissions issue on Exchange and not Outlook,
but I don’t know where to begin. I don’t want to start tinkering with
permissions without at least knowing the default minimum permissions that
should exist. Thanks for your help and suggestions.

 

[Sue Mosher [MVP-Outlook]]

You are correct. This is an Active Directory permissions issue. Most likely the Everyone group has Full Access permission on an OU or other container .

--
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003

and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers

 

[Guest]

Do you know of any documents that can help me reset the minimum permissions
on Active Directory? I don't want to do that blindly. I will "cross post" in
an Exchange group to see if I can get some help there too. At least I am
headed in the right direction. Thanks!

 

[Sue Mosher [MVP-Outlook]]

The Microsoft Knowledgebase is your friend. You might start at http://support.microsoft.com/kb/328670/

--
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003

and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers

 

[Guest]

Beautiful! That was it. I had forgotten that Blackberry support had asked us
to set the Domain Users group with send as/receive as permissions when we
were having trouble with the Blackberry server. Now I know better. I removed
that permission and all is back to normal. Thanks so much for your help!