Login Issues to SD+

• Users have imported from AD fine.
• LDAP is configured and connecting fine.
• If I make a user on the SD+, instead of importing it, and log it in to Local, it works fine
• The Admin account works fine (on local)
• dB is MSSQL (same as the original instance)
  
• No account, be it a requester or technician, will log in with domain credentials, it just says
  
• "username or password incorrect"
• The same account still works fine on the original instance of the SD+

Any ideas? 

Thanks.