Symptom: If you are trying to execute an admin consent flow for an application in Windows Azure AD which essentially lets it your application obtain an access token and refresh token on behalf of user from Windows Azure AD, you might see the following error message on the Microsoft login screen.
Resolution: The reason behind this is that the application you are signing up for is set for admin consent flow which can only be executed by a person who has global administrator permission. Application owners who use Windows Azure AD often go for admin consent flow so that each user individually does not have to give access to the app for obtaining their access token from Windows Azure AD. This provides a convenience that only global admin for Windows Azure AD has to provide consent one time but on the other hand can only be performed by person having global admin privilege and not just by any end user. If you receive this message, login with global admin and it should show the consent screen