Object Permissions:

Full Read/Create/Edit access

Contact

Lead

Account

Full Read access

Opportunity

Opportunity Contact Role

Task

Event

System Permissions

API Enabled

Run Reports

Export Reports

Access Activities

Customize Application

View All Data

Modify Metadata Through Metadata API Functions

View All Users

Making Permissions Changes

For “Salesforce” User License type

Head over to Setup --> Users --> Profiles --> [Select the Profile for your Integration User] --> Object Settings --> [then apply the necessary changes as specified above]

For "Salesforce Integration" User License type

Firstly, create a permission set that grants Read/Write/Modify All/Delete rights for the Boomerang Object, along with the supplementary permissions mentioned in the referenced article above. This new permission set should then be assigned to your integration user.

Next, navigate to the Integration User record. There, update the "Permission Set License Assignments" by including the standard permission for "Salesforce API Integration."

🪃

You could alternatively create a Permission Set with the permissions above and apply it to the integration user you created for Boomerang