I will add,
The root of this issue comes from version 5.0 after making a copy company. I worked extensively with SPS Support and eventually got the Tools team & SPS support guys to collaborate on the issue. (Thank you. Now add it to the KB).
Upgrade 405 to 5.0 in May 2013. Trying to process a credit card transaction after making a copy of the production company would return an error message ""Unable to Communicate with Sage Exchange"". The exchange was fine. The system just couldn't find the new vault ID assigned to the production company. The copy company did not have CC processing enabled but did show the Vault ID - copied over. This resulted in a new vault ID being provided to the production company, the one copied from. It's an empty vault.
As it was explained to me back in June 2013 by SPS Support, the Exchange is comprised of vaults. The company may have one vault or more vaults under its assignment where CC information is being securely stored. Look at it this way. You rent a bunch of storage lockers that reside securely behind a locked door. Only way to get to those storage lockers is through this one door. The storage lockers are your vaults and the locked door to access these lockers is the vault ID assigned in company maintenance. The copy feature runs and data is copied over, but there is only one access door and the door cannot be shared. So the primary company is basically given a new door or Vault ID. However that door doesn't lead to your row of storage lockers. So your exchange data previously recorded is no longer accessible or seen. You can process in company that was copied to because that is the Vault ID that links to the row of lockers you have data stored in.
AR5003 is the hot fix added to PU3 for Sage 2013.Which moves the data into a vault that the new Vault ID can access. My notes (write up) to myself on this issue is in the attached. I'm just saying , the messages returned from the errors are weak and weaker. Hope Sage resolves this soon. Many hours spend on the initial support tickets and at client's. Sorry if this is a little winded. (But where is the KB?!-Vote for Joan)