Users cannot open other users calendars after Exchange 5.5 to 2003 Migration

Rolled out Active Directory and migrated to Exchage 2003 (from 5.5) this weekend for a 100 user company. Everything seems to be going well except for this one little quirk. Users have always had rights to view everyone else's Calendars, as well as one group has the right to view & edit everyones contacts. The permissions were assigned by opening each users calendar permissions from their outlook and adding in the "everyone" distribution list and assigning the appropriate rights. Same for the contacts, our "contact group" was given edit permissions to all users contacts. Everything worked fine in the 5.5 world, until we added in the Exchange 2003 server.

We currently have both our Exchange 5.5 and Exchange 2003 Servers running, replicating (as Microsoft recomended we do until all users have logged in at least once to get the updated settings - then remove the 5.5 server). However now no one can access anyone else's calendars or contacts. We get an "Unable to display the folder. The Calendar folder could not be found." error. We found that we could give individual users permissions to other peoples calendars and they can access it, but it seems to ignore the "everyone" group that is setup. If we try to add any group to someones calendar (including removing and re-adding the "everyone" group) we get the following error:
"The modified permissions could not be saved. The client operation failed."

Any thoughts?

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BNettles73Connect With a Mentor Commented:

If you were running in a native 2003 environment then you could use Universal DL's to administer security ... in a mixed mode 2003 environment, I believe you have two choices ... either use Universal Security Groups to administer permissions for public folders ... or setup a temporary child domain and upgrade the functionality to native 2003 ... then you can use ADC to replicate your DL's and convert them over to UDL's, which in turn can be used for security ... that is the simple process ...

If you can make it a week, once 5.5 is gone you could just switch the AD to native 2003 (FYI ... I am not talking about Exchange Native ... we are speaking soley in terms of AD) ....

If you don't have many PFS then you might think about configuring Universal Security Groups and reset the perms on your folders ... this is a seriously tedious task for medium-large environments ...

Read through the Winnet article I sent you ... I'm pretty sure it covers most of this ...
i think the answer is actually pretty obvious in your question,,, distribution groups can NOT have secuirty rights,,, that is what secuirty groups are for.  Why you can even add distribution groups there i don't know.  I would test this out by adding on user (or secuirty group if you have one) to the access list for a calendar and see if that person (or a member of the group) can access it then.  If so then that is your problem.

The following articles will explain in detail the security issue you are experiencing ... what functional level is your domain? If it is still mixed-mode then you cannot use distribution groups to manage security in your E2K3 environment ... (references 2000 but still relevant for 2003) (references 2000 but still relevant for 2003)
smradminAuthor Commented:
mikeleebrla > Thanks, I'm new to AD & Exchange 2003. I wasn't aware that you cannot use DL's to control access. We can add users individually and it works, but I'm still trying to figure out how to give a group of people access (since I can't use DL's) and I can't seem to access security groups from the calendar permissions....

BNettles73>We are running in mixed mode because we have to keep our Exchange 5.5 server (running NT4) up for another week until everyone logs in and gets the new settings. Thanks for the articles.

Can either of you recomend the best way to procede? Is there a way to access security groups from the calendar permissions to grant access? Or is there another way of granting the appropriate permissions to calendars and contacts?
smradminAuthor Commented:
Thanks BNettles73, at least I have a couple options now
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