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Is there a way (either built-in or through a trustworthy add-in) to use OAuth 2.0 for authentication with MS Office Outlook client (on Windows desktop) for Google (or other sites)? Outlook 2016 still seems to only support password auth! The "Outlook Mail & Calendar" (also known just as "Mail") app on Win10 supports OAuth for at least Google and Yahoo accounts, but that app is missing functionality (found in "real" Outlook) that I need.
Everything I've found online talks about creating a client that uses OAuth to access Outlook.com, Microsoft's current webmail offering, but this is the reverse of what I'm trying to do; I want to use the client I have (Outlook, the desktop Win32 app that is part of MS Office) to connect to arbitrary (email, typically IMAP+SMTP) services that use OAuth for authentication.
While this question is about a security feature, it's not really a security question; I'm just trying to use a feature that every other non-trivial desktop (or mobile) email client supports, most of them for years now. It seems impossible that Outlook doesn't support it at all, but I can't find a way to use it!
CBHacking
Posted 2017-06-13T21:10:56.537
Reputation: 5 045
Related. The problem you will run into is that Google only supports the OAUTH 2.0 standard itself, and i suspect, the version Microsoft supports is sliently modified. – Ramhound – 2017-06-13T21:16:10.090
Has recently has of Nov 2015 Outlook 2016 did not support what you want to do though. You are out of luck – Ramhound – 2017-06-13T21:19:15.153
With G Suite's planned shutdown of less secure apps, I think it's time to revisit this thread. This link states "Outlook for Office 365, Outlook 2019 or Outlook 2016 (except for the Volume License msi-version) offer native support for OAuth 2.0". Why should Volume License matter? My colleague installed Office through a file called Setup.X64.he-il_O365ProPlusRetail_[random]TX_PR_b_64.exe and Outlook (1902) still wanted a password.
– LWC – 2019-12-22T19:45:54.480