While following the Mail Services migration guide from RHEL5 to RHEL6/RHEL7 OS, after re-registering the LDAP server, a task to reinstall openldap_server package fails with the output:
HCL err: ldap: unrecognized service
Unsatisified dependencies for the migration process:
- Install the required hotfixes per the KB article.
- Go to the node > Packages tab and upgrade all packages that can be upgraded.
- Re-run the task.
Note: if some services were migrated without the hotfixes installed, it is needed to go through all nodes and upgrade the packages on each of them.