Exchange 2010 server - Outlook 2007 cannot open a room calender but Outlook 2010 can using same login user
We have an Exchange 2010 server and have set up two Room resources. I want my Outlook users to be able to add a these room calendars. If the user is using Outlook 2010 it works fine, if that same user is using Outlook 2007 they get this message: You do not have sufficient permissions to open the calendar folder. You don't have appropriate permission to perform this operation. It has to be something with outlook 2007 client, but I am stumped on what to try. Any suggestions?
March 25th, 2011 5:31pm

I have given a user even OWNER explicit rights and it still does not work in 2007.
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March 28th, 2011 11:06am

Someone had this issue last week but can't find the thread. It worked for 2010 but not 2007 even after adding the perms. The solution was open the resource mailbox using pfdavadmin right click the freebusy data folder and see if the permissions you granted the user exists. It seems that if the user does not have FB access, granting him any rights doesn't work.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com
March 28th, 2011 3:38pm

Hi, If the permission is enough, but the issue still exits, Could you please try running outlook 2007 with /cleanfreebusy parameter.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
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March 29th, 2011 5:18am

Tried that without success.
March 30th, 2011 4:24pm

I am having a similar issue. I would love to see what the resolution is.
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April 18th, 2011 1:51pm

I am also seeing the same issue. Permissions are set properly I think. With the same user ID, opening the room calendar from OWA works, but not from Outlook 2007. We're using Exchange 2010 SP1. I can't open the resource mailbox using pfdavadmin, as it's not supported on Exchange 2010. I've used ExFolders, and again, the permissions look fine. User has Editor permission on the calendar. Default is set to AvailabilityOnly. Anonymous is set to None. To fix it, I had to give the user FULLACCESS rights to the Room's Mailbox. This isn't what I wanted, but it works.
April 19th, 2011 6:46pm

I am currently having the same issue for one of our users. I haven't tried giving full access yet but that is not ideal.
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May 16th, 2011 8:50am

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