Hello,
i migrated an Exchange 2010 Server (single Server with all Roles) to a Exchange 2013 CAS Cluster (2x Exchange 2013 Multi-Role Servers).
After migrating the Public Folders from Exchange 2010 to Exchange 2013 User reported me that they are not able to open/redirect/accept/decline an meeting which was send to a mail-enabled Public Folder.
For Explaination: Some departments have a own Public Folder (e. g. "HR-Department"). Other Exchange Users creating a meeting and send it to this PF. A Secretary takes a look at this meeting and redirect it to the correct User.
Using Outlook i am getting the Error "Free/Busy Information not available" in the down right corner.
Using OWA i also getting similar error (not able to check conflict between your calendar and this meeting) but i am still able to redirect/open/accept the metting-request.
Free/Busy Information between normal Exchange Users works without any issues.
Calender Permission for Default is set to "Read" for "Free/busy time".
Meanwhile i have checked Event Log and all settings and don't know, where the Problem is. It seems that the Public Folder (or Public Folder Mailbox) want's to read the Free/Busy Information of the User who tries to open the Meeting-Request.
If someone has any idea how to analyse this issue, please help.
I translated the error Message from a german Exchange Installation. So i may be possible that the original englisch error are a little bit different.
Thanks and KR
Marco