When you upgrade systems from SMS 1.2 to SMS 2.0, the data stored in the SMS 1.2 database as a result of IDMIF and NOIDMIF files is upgraded to the site database for SMS 2.0. IDMIF and NOIDMIF files on client computers are kept when you update, but the IDMIF and NOIDMIF files on the site server as a result of SMS 1.2 installation are erased, unless you archive them in a different directory. Because the format of custom MIF files is almost identical in SMS1.2 and SMS 2.0, you can preserve your custom MIF files for use with SMS 2.0.
To preserve SMS 1.2 custom MIF files on site servers for use with SMS 2.0
The entire %SMS% directory structure is replaced during the upgrade, so if you do not preserve the custom MIF files, you must re-create them later.