Surprise: Microsoft is enabling Gmail users to collaborate with others using Azure Active Directory B2B without requiring them to have a Microsoft account.

Developers can also use the Active Authentication development kit to build two-factor authentication into their custom applications and directories.

Microsoft is extending Azure Active Directory with two new authentication services for developers writing apps and services. AD B2C and AD B2B are in public preview now.

Microsoft announced on Wednesday that users of the Google identity and access service can use their personal log-in IDs with the Azure Active Directory B2B service to access resources as 'guests.' ...