Instruction Retrieval in ServiceNow
For Basic Authentication
If 1E Core has Basic Authentication enabled, then in order to retrieve instructions, the 1E ServiceNow application calls 1E Core to hit 1E. The application passes on the required information like the App name and 1E User credentials to 1E Core in order to retrieve instructions. Once 1E Core receives Instruction Definitions from 1E, it populates the complete information of all the instructions along with their parameters into the ServiceNow tables.
For Modern Authentication
If 1E Core has Modern Authentication enabled, then in order to retrieve instructions, the 1E ServiceNow application provides the Thumbprint of X.509 certificate and the App ID (also known as kid) to 1E Core which then hits the Identity Provider (IdP) with these details.
The IdP in return provides the access token to 1E Core, which is stored in the 1E ServiceNow application.
If the application already has an existing token, then 1E Core checks its validity or else issues a new token by hitting IdP.
Once the Access Token is retrieved, the application now passes the required information like the App name, Access Token and instruction details to 1E Core.
Now 1E Core hits 1E to populate the complete information of all the instructions along with their parameters into the ServiceNow tables.