Does anyone have experience with migrating a MS Dynamics database to CiviCRM
We are just at the end of migrating an organisation who were using MS Dynamics. In this case, they were providing us with spreadsheets and we were then sorting out the data clean up and manipulation in order to get the results required in CiviCRM. 

We didn't use our more complex tools such as the Drupal Migrate approach that we developed for a number of reasons, but even without that we have for example managed to take the old 'one row for every year of membership' and import it so we have a single row for continuous memberships etc.