Microsoft Outlook

Question

As Microsoft is going to depreciate Basic Auth , we have some outlook users and there sign in showing IMAP with Basic Auth .

Want to know below for some users

1. under product information it is showing Microsoft 365 Apps for Enterprise .
   2 .In outlook > File > Office Account > About gives me Version 2108 (Build 14326.20962) "Microsoft® Outlook® for
   Microsoft 365 MSO (16.0.14326.20936) 32-bit" License ID: EWW_9e7f9d3e-097d-45f3-a49b-
   129b62c3e4b4_acc0419eed3fa687a6.

Are they under legacy client or these outlook version are under modern Auth. I know outlook 2016 is using Modern Auth by default.

if possible also provide the brief details about the other different version which are under legacy client and other which are under Modern Auth.

Answer 1

Hi @Microsoft Q & A

There should be no imapct to your current version.

According to this official document: UPDATE: Exchange Online deprecating Basic Authentication (Basic Auth)

Please note this change does not affect Outlook for Windows or Mac if they are already configured to use Modern Auth.
Enable or disable modern authentication for Outlook in Exchange Online

And you could also refer to the links below to learn more information:
New minimum Outlook for Windows version requirements for Microsoft 365
How modern authentication works for Office 2013, Office 2016, and Office 2019 client apps

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Answer 2

This should give you the information you require about Outlook and Modern Authentication:

https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online