The SETUP files are packed together in SETUP.ZIP. Use the PKUNZIP tool to decompress the archives.

Instructions on how to fix the MTA disappear problem:

1. run the SETUP.EXE.
2. click OK to proceed
3. click the Button saying "Enables this Microsoft Exchange Server to connect to other Microsoft Exchange Servers"
   if this button doesn't show up, it means the MTA is enabled and visible in Exchange Admin.
4. click OK to exit the SETUP.

Note:
   If you already have X400, MSMAIL or SMTP connectors installed, you will have to re-install those connectors in order to make them work properly.