Confluence/Linchpin - How can I set the LDAP manager field from the LUP profile editor?

How can I set the LDAP manager field from the LUP profile editor? We face the issue that the field type is set to user and we cannot opt in the synch for this field in the profile editor.

Do you have documentation or instructions for this case?

Yes, on this page of our documentation you can read how to do that. Let us know if it worked!