Understanding the LDAP backup process
The following is the lookup order for LDAP information:

The LDAP information is stored in the %allusersprofile%\Lexmark\PrintManagement\backupRestore\ldapinfo.txt file.
Note: The password in this file is encrypted.
If LDAP information is detected from a source, then LPM uses that information for the backup and stops searching from other LDAP sources. For example, if LDAP information is detected from the Mobile Print solution, then it does not proceed to searching the IDM.
Supported versions
The backup feature is available for LDD version 4.8.0, and LPM version 2.3.11 or later.
If you are upgrading from earlier versions of LPM, then the installation does not proceed until LDD version 4.8.5 or later is detected. For more information, see System requirements.