Considerations when Connecting to Bullhorn CRM
Unlike many other data sources, Bullhorn CRM doesn't allow users to create their own custom OAuth applications or edit their CallbackURL directly.
Instead, the user must contact Bullhorn CRM and request that they create/change the user's OAuth information on Bullhorn CRM's end.
If a user needs to change their CallbackURL, waiting for a new one from Bullhorn CRM may be a time-consuming process.
It is highly recommended that users consider using an OAuth verifier code to connect instead. See Custom Credentials for more details.