A folder with the specified name already exists

Platforms

Source: Any > Destination: Exchange/Office 365

Problem

Error encountered during a migration to Exchange.

Evident in the trace:

Service Exception processing request. Code: ErrorFolderExists, Message: A folder with the specified name already exists., Retry

The reason for this error, is that the source platform has a native folder - 'Notes' for example, and the destination Exchange / Outlook also has a native Notes folder, but only for Outlook Notes. 

Solution

Therefore, the source folder needs to be renamed for a migration to work.