Duplicate folders are created in Microsoft Exchange Server 2013 after you move a mailbox that has large or corrupted properties or after you move a mailbox by using the -IgnoreRuleLimitErrors switch.
For example, you might see Task, Task1, Contacts, Contacts1, and so on. Also, the Folder Type value may be "User Created."
For example, you might see Task, Task1, Contacts, Contacts1, and so on. Also, the Folder Type value may be "User Created."