The Modify Message area is where you can set a User Defined Date ("Other Date") to which selected messages' Modified Date should be changed; it's also where you can select to use the Received Date or Sent Date as the date to which the Modified Date of selected messages should be changed. To change the Modified Date of messages in just one folder you can use the Modify Message area or the appropriate toolbar button. To apply changes to the Modified Date of messages in more than one folder, however, you need to select either Received Date, Sent Date, or Other Date in the Modify Message area and click the "Modify Message(s)" button to effect the change.

ArchiveAssist's operates on the basis of persistent selection; once you have selected messages in a folder by placing checkmarks in their checkboxes, those messages will remain selected for modification even once you select another folder's messages to be displayed in the message list.

The number of messages to be modified will be shown in the status bar and a progress bar will graphically display the progress of the modification operation.

After you've selected messages and pressed the "Modify Message(s)" button, the following "Confirm Modification" message will be shown, requiring your final approval for the modification operation to take place.