When importing new users (or modifying existing users) with an Exchange mailbox you may not want to have the Exchange recipient policy update the e-mail addresses for those users, by default when AD Bulk Users creates the mailbox ‘Automatically update e-mail addresses based on recipient policy’ is checked i.e. TRUE, to prevent this being set add a column to your CSV file entitled AutoUpdateOnRecipientPolicy and set the value to FALSE.
Click here for an example CSV file.
The result of setting AutoUpdateOnRecipientPolicy to FALSE is ‘Automatically update e-mail addresses based on recipient policy’ is unchecked meaning the recipient policy won’t update the mailbox for the user.
All the best.