Currently, we are not providing an official guide for migrating users between directories via database updates.
This is mostly due to the fact that this is a complex procedure and not officially supported by Atlassian.

Furthermore, the procedure varies between products and even versions.
This requires to constantly review and re-test the procedure, something we don't want to leave our customers alone with.

Please contact our support https://jira.resolution.de/servicedesk/customer/portal/1
or book a free screen share session to discuss this topic: https://calendly.com/resolution-support should you need help.

Goal

• migrate existing users between directories
  • i.e. from an LDAP based directory to the internal directory

Use-cases

Some user directories can't be migrated with Atlassian default GUI functionality.
These limitations are outlined in Atlassian's documentation: https://confluence.atlassian.com/adminjiraserver070/migrating-users-between-user-directories-749382806.html
The scenarios not covered are still part of suggestions/ feature requests: https://jira.atlassian.com/browse/JRASERVER-27868

Migration of users is typically needed in

• preparation for switching from LDAP to just in-time provisioning
  • i.e. no direct LDAP connection from your Atlassian instance possible anymore
• preparation for switching from LDAP to Azure AD