What is required to replace environment variable keys during a deployment?

To successfully replace environment variable keys during a deployment, matching strings are essential. This process typically involves identifying the correct keys in your deployment configuration that correspond to the environment variables you wish to substitute.

When the deployment occurs, the system searches for these matching strings within the given context, enabling the successful replacement of the designated keys with their respective values. This ensures that the deployment environment is accurately configured according to the specific needs of the application or service without any manual intervention.

While correct permissions are important for execution during the deployment process, they do not specifically address the mechanics of variable substitution. Apex classes and custom settings do not play a direct role in the replacement of environment variable keys but could be involved in other aspects of a Salesforce project or deployment strategy. Therefore, having matching strings is the core requirement for the replacement to function correctly.