Azure AD B2C - sign up/in using email OR mobile
问题 I'm using Azure AD B2C and we've been presented with a preference/requirement from our product team to allow users to sign up/in using either an email address OR a mobile phone number as the user id. Currently the built in flows only allow email or username as the user id. There's strong evidence to suggest that we could create a custom policy to allow for mobile phone number, but what I need is the ability to sign up/in using either email address OR mobile phone number. It seems like I'm not