Hi @Ray Chen
Thank you for posting this in Microsoft Q&A.
I understand that you are trying to create enterprise application from Microsoft Entra Gallery but instead of create option it is showing sign-up.
Abacus.AI Enterprise application is signed up using OpenID Connect-based Sign-on. As application using OpenID you need to definitely sign up for creating your application and to add application in Enterprise application list.
If you don't want to sign up, you should compulsory "Integrate any other application you don't find in the gallery".
Hope this helps. Do let us know if you have any further queries.
Thanks,
B. Siri Chandana.
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