Error
ErrorFolderExists
Cause
This error indicates that MigrationWiz requests a folder to be created in the Destination mailbox, but the Destination Exchange server assumes the folder already exists.
Resolution
There is a known issue related to an Exchange API MigrationWiz uses to create your folder it compares certain characters incorrectly and thinks that a similarly spelled folder name is the same folder.
For example, Exchange assumes the following two folders are the same:
- Caesar
- Cæsar
As we can see, these folders are different but Exchange considers "ae" to be the same as "æ" because it is incorrectly comparing them. Note that you do not experience this problem in Outlook, because it uses a different API to create the folder than we do during migration.
Solve the problem by first locating the offending folders and then renaming one of the offending folders at the Source. You will need to perform the following:
- Sign in to your MigrationWiz account
- Click on Go to My Projects.
- Select the project where the failing mailbox resides.
- Select the failing mailbox and click it to view its statistics.
- On the Migration Errors summary, you will find the "ErrorFolderExists" error that identifies the folder with a duplicate.
- Log in to the Source mailbox and rename the folder found (the one MigrationWiz fails to create) by appending something at the end of the folder, such as "2".
- Once you have renamed the folder, resubmit the mailbox for migration.
If the migration fails with the same error, you did not locate and rename the correct folder.