We are currently upgrading the CRM 4 system to CRM 2015 (both on-premise). Since there is no direct upgrade part we decided to re-write and clean the CRM 4 version. This is now done. However we encountered an issue when migrating and remapping data from the CRM 4 to CRM 2015 database. The issue we got stuck on is importing the disabled systemusers (for historical purposes) without recreating the corresponding active directory records.
The idea is to use SSIS to build a package to map and migrate data (using CRM adapters and script components).
Also, once the users are migrated, is there a way of mapping the new systemuserid on every record (createdbyid, modifiedbyid, etc) ?
Any ideas on how we can go about it?
Thanks in advance.