B2B Users limit account emails

Summary:

We are using the b2b accounts/users in Oracle Commerce. Right now we use the "Account Assignment Changed" email template and whenever a user gets assigned a new account they receive an email. Is there a way to only have this email sent out for new users/when their first account is added?

Or is there another email template to use instead of the accounts email? We have some users with a lot of accounts and we don't want to clutter their inbox but they need to receive the first email to set their password/be notified they are setup.