During the synchronization process, when being asked to locate your data file from ACS, there is a field that says "Location". When this field is clicked, MSP will ask you to type the address of the database server. What this refers to is the NAME of the ODBC driver as it was given when the driver was installed.
NOTE: If you have not yet obtained your ODBC driver from ACS, you need to write your ACS support representative and ask for a "Read-Only ODBC driver." (The driver is free but you need to fill out a request form.) You must install the Read-Only ODBC driver before importing or synchronizing data with MSP.