azure-sdk-for-python: ResourceNotFoundError (404) with DocumentIntelligenceClient

Environment:

• Python Version: 3.9.13
• Old SDK: azure-ai-formrecognizer 3.3.2
• New SDK: azure-ai-documentintelligence 1.0.0b1

Issue: I am facing a ResourceNotFoundError (404) when using DocumentIntelligenceClient in the new Azure SDK version 1.0.0b1. The old SDK version 3.3.2 (DocumentAnalysisClient) works fine with the same endpoint and key.

Reproducible Steps:

1. Working Code with Old SDK (azure-ai-formrecognizer 3.3.2):

   from azure.core.credentials import AzureKeyCredential
   from azure.ai.formrecognizer import DocumentAnalysisClient
   
   endpoint = os.environ["ENDPOINT"]
   key = os.environ["API_KEY"]
   
   client = DocumentAnalysisClient(endpoint=endpoint, credential=AzureKeyCredential(key))
   with open(path_to_sample_documents, "rb") as f:
       poller = client.begin_analyze_document("prebuilt-layout", f)
   

2. Non-Working Code with New SDK (azure-ai-documentintelligence 1.0.0b1):

   from azure.core.credentials import AzureKeyCredential
   from azure.ai.documentintelligence import DocumentIntelligenceClient
   
   endpoint = os.environ["ENDPOINT"]
   key = os.environ["API_KEY"]
   
   client = DocumentIntelligenceClient(endpoint=endpoint, credential=AzureKeyCredential(key))
   with open(path_to_sample_documents, "rb") as f:
       poller = client.begin_analyze_document("prebuilt-layout", f)
   

Error Message:

azure.core.exceptions.ResourceNotFoundError: (404) Resource not found