title: Cannot connect to SQL Server as a member of AD group
body: <p>I am facing an error to connect to SQL Server as a member of a new AD group. Could anyone advise below?</p>
  
  <p>I am a member of an AD group and this AD group has DB owner access in the instance and database level on SQL Server through Windows Authentication.</p>
  
  <p>When I tried to connect to the database sever, the I faced the below error message:</p>
  
  <blockquote>
    <p>"Cannot connect to database_server_instance_name. 
    Login failed for user 'domain_name\my_user_id' (Microsoft SQL Server Error, Error: 18456)"</p>
  </blockquote>
  
  <p>I double checked the permission settings for the AD group and it is added as "Groups". </p>
  
  <p>This AD group has a few other users and same issue is observed by everyone in the group.</p>
  
  <p>I am planning to request our security team to check the AD group settings. May I know what would be possibly missing with the AD group?</p>