How do I create an ad group?

To add a new membership group in Active Directory

  1. Open the Active Directory Users and Computers console.
  2. In the navigation pane, select the container in which you want to store your group. …
  3. Click Action, click New, and then click Group.
  4. In the Group name text box, type the name for your new group.

For More Information Please Refer: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-firewall/create-a-group-account-in-active-directory