The program was developed to ease the migration from MS-Mail and the TFS-gateway to MS Exchange and Outlook.
The TFS-gateway to the Internet uses the MHS address type, i.e. external addresses are stored as MHS-types in the PAB-file. The MS-Mail client normally adds all receivers (internal MS-Mail addresses as well as external addresses) to the PAB-file. After a complete migration of a post office to MS Exchange all internal MS-Mail addresses will become obsolete. The MS-Mail client first searches the PAB-file for an address look-up. The Outlook client does the same as default