Change the Security Groups on ER (Enterprise Reporter):
- Run the database wizard
- On the Configure Security Groups step:
- Enter the domain name of the ER server's service account
- Enter the security group names, ER will attempt to find these groups in the specified domain, if the groups are not found, they will be created in the domain's users containers.
- Continue the database wizard
The security groups could be created first, even on different OU (Organizational Unit) as required.