Hello @YQ
Thanks for reaching out to us, I think the docker now is General Available so you can use it directly without any access application now- https://learn.microsoft.com/en-us/azure/ai-services/document-intelligence/containers/install-run?view=doc-intel-3.1.0&tabs=read
Please let me know if you have any question during the set up process. I hope this helps.
Regards,
Yutong
-Please kindly accept the answer and vote 'Yes' if you feel helpful to support the community, thanks a lot.