>> But, once after adding and click on "Update", I could see those configuration in the tab - "Source Backend LDAP Servers". >> Where will be these configuration? I am sorry but can't understand your question. If you see those configurations staying here.. what's the problem then? >> Which was the log file to validate this LDAP connection?? All Cache Refresh related log is same. oxtrust_cache_refresh.log

Sorry Typo error... But, once after adding and click on "Update", I could NOT see those configuration in the tab - "Source Backend LDAP Servers". NO Error Logs in oxtrust_cache_refresh.log

I think you are talking about [this](https://support.gluu.org/view/installation/ldap-parameters-were-lost-after-update-button-was-clicked/1911) ticket. I answered there, may be you can put your comment there.