Hello JADEngracia27,
Thank you for posting in Microsoft Community forum.
What account do you want to access your AD server?
You can try the following actions on one Domain Controller to see if it helps.
1.Add this account as one member to Remote Desktop Users group.
2.Open gpmc.msc on DC and edit the Default Domain Policy object and navigate to Computer Configuration\Policies\Windows Settings\Security Settings\Local Policies\User Rights Assignment\Allow logon through Remote Desktop Services, this user or the group with this user should be in the list.
I hope the information above is helpful.
If you have any question or concern, please feel free to let us know.
Best Regards,
Daisy Zhou