When a hotfix is added to the CAL deployment schedule, the system automatically deploys the major Simphony version (for example, 18.2.0.0) first, followed by the hotfix.
When using Distributed CAL (DCAL), you must add both the major version and the hotfix to the DCAL download schedule. After the download occurs, it is made available in the DCAL server. Then you can schedule the POS client update.