Hi. We are currently experimenting with Azure Active Directory. Recently, when I try to add a user using the Invite external user feature, the recipient gets an email as usual, but the link returns a 404! I have tried multiple email addresses, but all invites I sent out fail. I get the attached 404 when pressing the https://login.microsoftonline.com/redeem?rd= invite link. Is the service down? it worked in the past.