Duplicate Calendar folders appear after Calendar synchronization (4259565)

In some cases after calendar synchronization mailbox will contain duplicate calendar folders

Instructions on how to Resolve Calendar 1 issue:

- stop Calendar Agent
- on Source mbx perform following
- set pr_container_class property on the original Calendar folder
- either export appointments from the Calendar1 or just drag and drop them into the Calendar folder
- once confirmed that all appointments are transferred and valid within the Calendar folder proceed to the next step

- login to the source mbx with MFC and delete the Calendar1 folder
- verify that target mbx has valid Calendar folder
- launch Outlook with /ResetFolders

-start the calendar agents