Removing Old Migrations from Data Migration Manager

You may get to the point where you have performed a number of migrations with the Data Migration Manager (DMM) - test and/or production.

You may have experienced that a bulk deletion or import gets longer with each migration as your total data in the MSCRM_MIGRATION database (which is either going to be in the SQL Database you specified during the install of DMM or on a local SQL Express instance) increases.

You may also have experienced a small inconvenience where all your migrations have to have a unique name.

All that is needed to get around this small problem is flushing ouu the ImportBase table in the MSCRM_MIGRATION database.

USE MSCRM_MIGRATION;

DELETE FROM ImportBase;