Active Directory Migration

Hi,

we’re planning to migrate to a new domain and in this context, switch to a new username-scheme.
Since I couldn’t find much information about how to migrate LDAP-users, I tested migration of a specific user via SQL update of the user’s record.

Since this didn’t turn out successfully, here’s my question:

If I need to migrate users from
[email protected]
to
[email protected]
what are the necessary steps to accomplish this?

Best regards
Thomas