Probable this URL could help you http://learn.elgg.org/en/stable/design/security.html and while you are in the administrator panel, maybe you could create a second administrator user with different password just in case you ever lose the first admin..

Thanks for the response. This page doesn't list out my exact issue. Also, the example I mentioned above, that a user is facing this, they are already a second admin. But still, when they logout, they are not able to login again with same password. They had to reset password and login every time.

Is there any config on the backend needs to be changed? Or is there a setting in Elgg website to change?

there is nothing in Elgg which does this. In default Elgg the only way a password changes is if the user requested a new password (and clicks the confirm link), if the user changes the password on their settings page or if an admin resets their password (which then send the new password in an e-mail to the user).

There is no mechanism which changes your password on login or logout.

Do you have any 3rd party plugins enabled which could influence this behavior? Maybe a one-time-use password plugin?

please don't double post your questions. I'll close this one, follow up can be here https://elgg.org/discussion/view/3322711/csv-file-upload-to-elgg-website

Hello, please help with the recommendations to my above query

Can you explain in more detail what you want to do? 

What fields and for what entities do you want to import?

Is it from another Elgg instance?

If so, are your Elgg versions the same?

Do you want to fill the fields of existing entities or do you need to create them first?

Perhaps we can figure out what you need.

But in any case, you'll need to either create the plugin yourself or hire a developer, as there are no ready-made solutions yet.