Creating a sub-admin
To create a sub-admin (or super-user) with some limited account management capabilities:
And in the advanced options, select which teams can the sub-admin manage(A). He/She will see those teams under his/her ad manager and will be able to post under those teams' users. Your sub-admin will also be able to manage selected teams' quotas. Unfortunately your sub-admin won't be able to manage users nor boards. Please mind that you can provide those privileges to an existing user - no need to add a new one.