Removing all and reinstalling just the AD bits is more effort then is required. just remove the Exchange bits if they are installed. The mapping data is in the AD LDS data base and stored in the project (upped more node on the left) ADPW and EPW are part of the AD bits and license. Exchange bits are only needed if you are migrating Exchange mailboxes and PFs.
If I understand correctly we will still perform AD and EPW processing as you previously described?
Yes, same process as above.