Mailbox Auditing Error: String list does not allow duplicates. (4319744)

When trying to add a mailbox to be audited you get the following error: String list does not allow duplicates

There is a duplicate Display Name already added in the List.

1. Expand Exchange Organizations

2. Select the Mailbox Auditing Tab

3.Go through the List of Mailboxes that are already added and find the Duplicate entry and select Remove.

4. Click the Apply Button

Note: Make sure there are not more than one duplicate entry or you will continue to get the error.

Or Contact Support for a SQL script that will find all your duplicates for you.