A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Hi RajeshB2926,
You are right. The authentication method is different for Microsoft operated Office 365 and 21Vianet operated Office 365. For the issue that cant retrieve BinarySecurityToken from SAML Response of Office365 operated by 21Vianet in China, I would suggest that you contact Office 365 operated by 21Vianet Support for professional support. Please click Apply for support under Office 365 support in the page: http://www.en.21vbluecloud.com/contactus.html
Thanks for your understanding.
Shirley