Rancher & Active directory

We have created a bind user for AD.
Trying to integrate Rancher with AD.
What should be the access rights of Test user - whether this user should have AD admin rights? Right now trying with normal AD user.

We are getting this error,

server error while authenticating

Request suggestions.

For FreeIPA I have a completely unpriviledged service account user. Can’t say for certain for AD.