title: Set default Send-As address using GAS
body: <p>Does GAS have the functionality to set the default Send-As address of a user to a sub-domain of a primary GApps domain, if the script is authorised by a Super Admin on the domain?</p>
  
  <p>I have a signature script that's authorised using a token by a Super Admin on the domain, and was hoping something similar could be done to set the Send-As for users as they join.</p>
  
  <p>We have several sub-domains, and users need their Send-As set related to the country they're in.</p>