Click here to see the image. We are using a service account as a manager to users/clients GMB listings, so when our user/client sees its listing users at the google my listings UI page, the user/client sees the email address of the service account, which is not readable for a client/user, so we want to show our company name or our email address. so is it possible to change the format or service email address to our email address or any other way by which the user/client can see our email address instead of the service account email?
No, service account email addresses can't be changed at all. They are not a part of your domain and so can not be given a different email address. The best you can do is use impersonation to make the service account take actions on behalf of an account in your domain.
