User list with using Active Directory

I have two problems.
One is that all user of active directory are not shown in user list. It is only 250 users. How to show all users?
Another one, I would like to auth each accout with active directory only. Because active directory users are 1000 over.
And also, also users are not active user. So I would like to show loginned user in user list. Is there plugin or patch?

Shinji Tamura

My first probrem is same with Problem with local admin account attributes when integrate with AD

My environment is NextCloud 12.0 on CentOS 7.3