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Tax: Security token verification failed due to: Communication Exception occurred connecting to VANguard STS

M2M Machine Credentials may be expired

  1. Open Elite Practice Management.

  2. Go to ATO Processing, PLS Setup.

  3. If expired please use the steps in the knowledge article applicable to your version of Elite:
    Tax: Set Up M2M Credentials in Elite Desktop


Machine Status

Is your machine's status currently active, or has it been revoked for any reason?

  • If the machine credentials have been revoked, create new machine credentials in the ATO RAM Portal and configure them in Elite PM.

  • If the machine credentials are still active, please provide a screenshot confirming their active status when creating the case.

Check Time Settings

Please check and confirm that your machine's date and time settings are correct.

Example: The device time is not synchronised with Internet Time.

If the time settings are correct, please provide the latest PLS Response generated when creating the case.


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