I found the following article for Fisheye that allows migration to a different external LDAP server. https://confluence.atlassian.com/fishkb/migrating-between-two-external-ldap-domains-with-different-username-formats-947847625.html. I need to migrate to a different LDAP server where the logon ID is different between the two LDAP server. We will be opening a ticket with the vendor, but I am wondering if anyone has done it.