title: USER_DOES_NOT_BELONG_TO_SPECIFIED_ACCOUNT when trying to get Envelope Status or Documents
body: <p>I'm using the DocuSign API to make various calls, and this is the only one I've had problems with. Basically the account has a bunch of users with reduced permissions (Permissions to send documents, work with the API, send on behalf of user, and allow receipt of transferred documents (?))</p>
  
  <p>There have been no issues using the createEnvelope call, using the exact same configuration, but for some reason I'm having issues using the EnvelopeDocuments:get call. I've tried setting it up following the guides, and am currently using Postman to test this, but I keep getting that error above and I can find nothing on what would cause this:</p>
  
  <p>I'm making the call to </p>
  
  <pre><code>https://docusign.net/restapi/v2.1/accounts/{main account GUID}/envelopes/{Envelope ID}
  </code></pre>
  
  <p>The envelope is definitely on the live platform, not the sandbox. The account ID is the second value found right at the top of the API and Keys pages. To authenticate, I'm using the same Access Token as I did to send the envelope.</p>
  
  <p>The envelope is sent as a non-admin user, I don't know if that has anything to do with it? Is there a permission that needs to be set?</p>
  
  <p>The same call worked on the Sandbox platform, but on that one the user who had sent the envelope was also the main account user.</p>
  
  <p>Any help is greatly appreciated, and let me know if I need to supply more information!</p>