In order to sync between Sage Live and Viewpost, you will need a Sage Live Authorization Key. You can generate this key in Viewpost in Sync Settings after you are designated as a Sage Live user by Viewpost. (To be designated as a Sage Live user, contact Viewpost Customer Support at 888.248.9190.)
A user with Admin permissions needs to log in to your company's Viewpost account and click on Sync at the top of the screen and then select Sync Settings.
Click on the button that says "Generate New Key" and a key should appear in the box to the left, together with an expiration date.
A representative from Viewpost will then lead you through the process of entering the Authorization Key into Sage Live.