Solved
Access Denied when accessing Campaigns in REST API
I'm getting "Access Denied" with a response code of 603 anytime I try to access and of the Campagin endpoints. I have an API user setup and working, with Lead and activity Read-Write permissions. I am able to access and edit leads and lists without a problem. This is a problem with both the GET method and POST in conjunction with the _method parameter. I have also tried giving the API Role all permissions just for testing and am still experiencing the issue. ANy Suggestions would be greatly appreciated.