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Basic Authentication and Exchange Online AMA

Event Ended
Wednesday, Oct 13, 2021, 09:00 AM PDT
In-Person

Event details

We are very excited to announce a Basic Authentication and Exchange Online AMA!   An AMA is a live text-based online event similar to a “YamJam” on Yammer or an “Ask Me Anything” on Reddit. This ...
Dylan_Snodgrass
Updated Oct 13, 2021
AMA
mmattana's avatar
mmattana
Brass Contributor
Oct 09, 2021
Hello there! I have some questions 🙂 - What happens if your Office 365 uses ADFS with federated domains? Do we need to change anything? - What happens if you use Exchange Active-Sync devices that do not support modern auth? Will they stop working? - Is there a checklist that we can run against a tenant to understand it's ready to switch off B.A. without impact? Thanks guys!
Greg Taylor - EXCHANGE's avatar
Greg Taylor - EXCHANGE
Icon for Microsoft rankMicrosoft
Oct 13, 2021
Hi Massimo, Federation with ADFS doesn't really change anything - if you use Basic to authenticate to Exchange Online (which you do when Modern Auth is disabled or unavailable), that will be blocked after we make these changes, federation or not. You need to update the clients/apps to use Oauth (Modern Auth). That includes ActiveSync devices too. A good way to check to see the impact would be to enable Conditional Access in report only mode, and create a policy to block legacy auth. Or, use the Azure AD Sign In logs to filter by legacy auth and see who's using it.
  • mmattana's avatar
    mmattana
    Brass Contributor
    Oct 13, 2021
    Hi Greg, thank you so much for the answers! Ok for ADFS and EAS. I'll follow up about the CA on the other post! Thank you!
Date and Time
Oct 13, 20219:00 AM - 10:00 AM PDT