Service accounts do not need to be put into the AuthAnvil Override Group. The protection scope of the AuthAnvil WinLogon Agent and Credential Provider only covers interactive logons, so unless you are actually logging on using the service accounts, they will not be affected by AuthAnvil.
Questions?
If you have any questions or need some help, we would be happy to assist. Open a case at help.scorpionsoft.com or send an email to support@scorpionsoft.com.