DevTest 10.4 - LDAP file import not working

Document ID : KB000118023
Last Modified Date : 23/10/2018
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Issue:
When importing existing/known-working ldap-mappings.xml & authentication-providers.xml files (used in version 10.1 registry), the UI reports successful import, but it does not show in the list.
Environment:
DevTest 10.4
Cause:
Missing the <user-dn-pattern> tag in the authentication provider file. 
Resolution:
Added <user-dn-pattern> to the authentication provider file  and  was able to successfully import  LDAP configuration in 10.4