问题
Can we do customization in Dynamics365 portal up to such extent that we create a website with asp.net and java script which interact with Dynamics365 entities and open inside dynamics365 portal.
回答1:
Yes, you will probably need to setup single sign on authentication between your website and the portal, the suggested manner of which is Azure AD B2C.
This is currently possible but undocumented, official support is coming soon.
This slide is from an executive briefing by Microsoft last week.
来源：https://stackoverflow.com/questions/44743040/customization-in-dynamics365