See the folder owner or your administrator to change your permissions. Right-click the folder, then click Properties to check your permissions for the folder. You don't have permission to create an entry in this folder. Additionally, when you make changes or additions to a calendar, you may receive the following error message: When you start Microsoft Outlook, switch folders, or synchronize email, you may experience slow performance. Outlook performance issues when you have many shared folders or mailboxes open
