I was hoping to switch the locale used in the Azure MFA "Call Me" function used in Azure AD B2C to en-GB rather than the default en-US (refers to "pressing the pound sign" which isn't a term we use in the UK). It seems the best you can hope for is just a default English language with no regional/sub-culture options.

The backup plan is to record our own Greeting(s). However the option to add your own greetings is grayed-out:

Does anyone know what precondition must be satisfied so I can access the " Add greeting" link?

CodePudding user response：

This is a list of all supported languages for multi-factor authentication (MFA) notifications. This is triggered by the ui_locales query parameter presented in the URL or browser preference configuration set by user.

That MFA blade (your image) isn't entirely supported by Azure AD B2C. Review the primary documentation on Customize language.

Azure AD B2C does support connecting to third-party MFA solution where you can add services such as customize voice.