Resolution

Payments Admin will have this functionality built in. If this is not functioning as desired:

Upgrade to Cashiering 2021.10.1.0 or higher, as this was implemented with this service pack.
Within Cashiering, test the connection to Payments under Administration > Settings > General Tab. Locate the Test Payments button to test the connection to Payments. Reach out to support should this fail.
In Payments Admin, the Transactional systems information needs to be populated. More information on both settings can be found here: Cashiering - Payments (Reconciliation)

If the process is not working, or the concern is about why transactions that originated in Cashiering that are voided in Payments Admin aren't reflecting properly in Munis, see below. A void in Payments Admin sends the void back to its external system of origin. If Cashiering is not receiving the void, then neither will Munis.

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