This is essentially a repost of Emile's post
here. But I am experiencing the same issue after getting ADFS 2016 working with the Azure MFA connection and keen to know if others are. I have a single relying party enabled for MFA as a secondary factor and I get this issue. My test user has the app notification
method set as their default MFA method.
When I authenticate through ADFS 2016 using the app notification MFA method as a secondary factor, it displays this error: "Verification request is not for an activated account” in the Authenticator app on my phone after I hit Approve. Then if I let
it timeout on the ADFS page and try again (by selecting the app notification method on the ADFS form), it works fine.
All other authentication methods work through ADFS, even the app notification works on the second attempt. It just doesn't work on
the first attempt. It's bizarre but I've tested it through WAP, directly to ADFS, with and without load balancing... the error is always consistent.
Has anyone else seen this behavior or know what it is?