Dear colleagues,

It's not possible to login if you don't have Yammer enabled getting the following error:
AADSTS650052: The app needs access to a service ("https://api.yammer.com/\") that your organization has not subscribed to or enabled. Contact your IT Admin to review the configuration of your service subscriptions.

Thanks and regards,
Ivan