User Impact
If action is not taken, users with Basic Authentication enabled for the affected protocols will be unable to sign in.
Action needed
Microsoft has started to disable basic authentication for protocols in scope randomly on selected tenants.

Protocols that are in scope for disablement:

  • MAPI (Outlook)
  • RPC
  • Offline Address Book (OAB)
  • Exchange Web Services (EWS) (Outlook for Mac/MacMail)
  • POP
  • IMAP
  • Exchange ActiveSync (EAS) (Mobile Devices)
  • Remote PowerShell
Microsoft will be disabling basic auth for all tenants permanently in January 2023
Additional diagnostics
Please verify you are using clients configured with Modern Authentication.

Outlook 2013 – Outlook 2013 is now out of support so you will need to upgrade to Outlook 2021 or 365

Exchange ActiveSync – Users may need to remove and re-add their account to fully switch to Modern Authentication on mobile devices using EAS protocol. If you use the Samsung email client you will need to use either the Gmail or Outlook app 

POP/IMAP clients – If your POP/IMAP clients or apps are unable to connect, you might need to change your email client to one that supports Modern Authentication (Outlook does not support Modern Authentication for POP/IMAP accounts), or switch to Outlook on the web. You can use your browser and access Outlook on the web via

Need Support

Please open a support ticket ( or call 01925 818 252 (9-5) if you need assistance 

Friday, October 28, 2022

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