To Archive an Inbox message:
  1. Click Messages in the top-right of your screen. The Inbox defaults to Active messages.
  2. Locate the message you wish to archive.
  3. Click the Archive button on the right. This moves is to Archived messages.
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To Unarchive an Inbox message:
  1. Click Messages in the top-right of your screen.
  2. In the View By filter, select Archived.
  3. Locate the message you wish to unarchive.
  4. Click the Unarchive button on the right. This moves the message back to Active messages
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