Issue Description: Outlook performance issues when many shared folders or mailboxes are open. Additionally, users may encounter an error message when making changes or additions to a calendar, such as:
“You don’t have permission to create an entry in this folder. Right-click the folder, then click Properties to check your permissions for the folder. See the folder owner or your administrator to change your permissions.”
Latest Update and Guidance: It is a known issue within Outlook that an error occurs when making changes or additions to a calendar. The recommendation by Microsoft is to have 5 shared folders or mailboxes, but on a faster connection this can be as high as 10 or more. For more details please follow the Microsoft KB article.