Entra ID deadline March 31 — apps without service principal will break
Microsoft Entra ID stops supporting app auth without a service principal on March 31. Check your app registrations now.
Microsoft has announced that Entra ID will no longer support app authentication without a service principal after March 31, 2026. This is a breaking change that can hit legacy app registrations.
What this means
Historically, some apps could authenticate against Entra ID without having an associated service principal object. Microsoft is closing that path. Apps without a service principal will get authentication failures after the deadline.
This primarily affects organizations with older app registrations that were never updated, or third-party integrations created before Microsoft's current model.
What you should do
- Inventory app registrations in Entra ID admin center. Look for apps without an associated service principal.
- Create service principals for all apps that lack one. Go to Enterprise Applications and verify.
- Test before the deadline — March 31 is a hard cutoff, not a warning.
- Check third-party apps — SaaS vendors may have apps that are affected.
How HaggeBurger can help
We offer a quick inventory of your Entra ID app registrations (1-2 hours) where we identify apps at risk of breaking. We fix the configuration on the spot.
Want us to check your environment? Get in touch.