Data Transfer Overview
The data transfer is handled through background tasks. As each sequence is processed, a background task is created that moves the data from the external application database into the target database, validates the data, applies any import rules, and logs any problems that were encountered.
Use the preliminary data transfer process to test and correct the mapping of data.
See Performing the Preliminary Data Transfer.
Then use the final data transfer process to actually transfer the data from the external application database to the target database.