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How do I add OAuth2 authrntiocation to my Microsoft® Outlook® 2021 MSO (Version 2408 Build 16.0.17928.20114) 64-bit ?

Gerrard Read 0 Reputation points
2024-09-29T18:29:08.04+00:00

Simple question, I am using Microsoft® Outlook® 2021 MSO (Version 2408 Build 16.0.17928.20114) 64-bit to access my Microsoft accounts, (@outlook.com and @live.com) but do not have the OAuth2 authentication required.

How do I enable this?

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  1. ChristyZhang-MSFT 23,886 Reputation points Microsoft Vendor
    2024-09-30T05:41:53.4333333+00:00

    Hi @Gerrard Read ,

    Welcome to our forum!

    According to your description, i understand that you are using Outlook.com account and Outlook 2021 desktop client. As i know:

    Outlook supports Modern Authentication in all current Microsoft 365 subscription SKUs and Outlook 2021 LTSC (any SKU with build 11601.10000 or higher) when connecting directly as Outlook.com. If your Outlook is configured to connect to Outlook.com using POP or IMAP, Modern Authentication is not supported.

    Please check if you have configured your Outlook.com account as POP/IMAP in Outlook 2021. If so, please try to create a new Outlook Desktop profile(Control Panel>Mail>Show Profiles>add) and then add your Outlook.com account using automatic account configuration.

    More information: Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps.

    Hope to help you!

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