Hi Daniel,
Did you check my last post ?
Such a change is not supported due to the same reasons mentioned earlier. SAP has not tested any scenario where such a change has been made and cannot guarantee that the system will operate 100% correctly after changing the datasource – it is not officially supported.
If your system is a new system in which LDAP source has not made any changes to your JAVA stack, you can go for a restore. However, that is rarely a case. So, in short you cannot do it. If you want to do, method is given above and it's on your own risk.
Divyanshu