Authentication
The direct print and file service runs as a user in Business Central. For on-prem installations, the user is a regular BC user, and in a cloud environment, it is an AAD user, also known as a Microsoft Entra Application.
We have created a permission set for the direct print service called FORNAV DIRPRT SVC. You can use this permission set for both on-prem and in the cloud.
Read more about the differences and how to set it up here: