解决了我的问题.对于那些感兴趣的人，注册的订阅ID与我尝试使用的表单识别器不同.当我为他们提供了正确的订阅ID时，MS纠正了，现在一切正常.

Resolved my issue. For those interested the subscription ID that was registered was different than the one I was trying to access Form Recognizer with. MS corrected when I provided them the correct subscription ID and now all is working.