Batch update clearing out values (4299476)

When attempting to update Accounts using Batch Update Accounts and remove an email address for multiple users, leaving the "Release Notify Email" column blank does not update the accounts and clear the field for multiple users.

When using the Batch Update method, it is not possible to leave the column field blank and expect the field to be deleted.

As per the instructions on the Accounts | Batch Update Accounts instructions, it is required that the user input !NULL (exclamation point followed by the word NULL) to clear the data in a users account.