Hello,
After migrating a customer from Windows Small Business Server 2008 R1 to Microsoft Windows Server 2012 (DC) and Microsoft Windows Server 2012 & Exchange 2013 there are a few issue regarding the GAL and old migrated calender items that we are unable to resolve:
Old calender items which were Exported to PST when the Server 2008 R1 environment was still live were imported to the new mailbox of the user, located on the Exchange 2013 mail database. This seemed to be working just fine.
The problems arise when a user tries to edit or re-send an old calender item. There actually are 2 problems:
1. When resending an old calender item, OLD GAL entries are used (even when re-entering the contact details) and the emails are send to nobody and you get the mail back from postmaster
2. When updating an old calender item you get an error that you do not have permissions, probably because you are NOT the 'old' Exchange user.
Thanks in advance!