One of my users getting this error below when someone sends a calendar invite to her. She cannot accept this invitation. She also cannot make any changes on her recurring meetings. If she does, she will get the error message below. We do have other users who have more mailbox/calendar used space than her and not getting this error but her.
Error: "The message store has reached its maximum size. To reduce the amount of data in this message store, select some items that you no longer need, permanently delete them"
User detail info:
Outlook 2010, without cache mode > OST
Calendar used space: 285MB
User mailbox used space: 40GB
This user is in litigation hold status
Have verified this user mailbox database space: unlimited
Steps has taken:
Delete user Outlook profile and recreate a new one
Ran mailbox repair corrupted items
Any help would be greatly appreciated.