@Mukund81 you can install SAML, WS-Federation and OAuth 2.0 tracer - (https://chrome[dot]google[dot]com/webstore/detail/saml-ws-federation-and-oa/hkodokikbjolckghdnljbkbhacbhpnkb?hl=en) in order to record the OAuth2 flow and see what user attributes are sent by Azure and its names.

Make sure you are registering at the User Mapping section the right names and also make sure Azure is providing all required attributes.