Forum Discussion
Basic Authentication will end on October so I decided to make a guide on how to handle it
Basic Authentication which doesn't allow for MFA enforcement will be disabled on October 2022, this means smtp, pop,imap and Exchange ActiveSync (used a lot by iPhone) won't work anymore.
We helped a few tenants make the move and decided to create a guide , hope it helps:
How to successfully disable basic authentication on Microsoft 365 before end of life support
If there are any questions please feel free to post them.
Update: It seems Microsoft might be testing disconnecting some protocols beforehand for a brief period. So if you would like to check if your tenant was affected, open your tenant admin through this link which will pre-fill a support request (image here) and the solution is a test tool which will check which ones are disabled.
Many thanks for this help.
It begins to be clearer but still murky. Still better than Microsoft """explanations""".So now, I followed your process and discovered that three users (myself included) and an automatic mailbox use the simple authentication. I see it is with "Office 365 Exchange Online". And now what ? I can't manage to understand what is wrong and how to fix it.
Thanks for any more explanations.
edit :
I think this is this point I do not understand :
"After providing instructions to users on how to migrate their devices to Modern Authentication your tenant should prevent those users from adding new devices through legacy authentication.". The tenant (me) does not know how to migrate the devices and not even what devices
Make sure on your Azure AD sign in logs you enable the Columns Operating System and Device Browser used for the sign in, it will help you understand from which software/device the legacy protocal is being used.
In the OS what does it say ? Are you using iOS ? if so then try removing your account and re-adding it because it still might be using Exchange Active Sync.
Forgot, on our website we have a Web App which will tell you what devices users are using and will send you either a daily or weekly reminder of new devices users signed in still on legacy protocols.
More info on a Reddit post
