'Starting October 13, 2020, Office 365 ProPlus or Office perpetual in mainstream support will be required to connect to Office 365 services'? Isn't that contradicting, like why would Office 2013 be required to use Modern Auth if it won't even be able to connect to Exchange Online? So I guess I'm wondering, why would the previously mentioned article show 'This change requires that Office 2013/Office 2016 are also required to use Modern Auth' but also show

Q: Why October 13th 2020? Why that date? A: Starting October 13, 2020, Office 365 ProPlus or Office perpetual in mainstream support will be required to connect to Office 365 services.This change requires that Office 2013/Office 2016 are also required to use Modern Auth.' However, if the app is using Modern Auth/OAuth, then no, it will keep working as it did before. If it’s using EWS, and if it’s using Basic authentication then yes, on October 13th 2020 it will fail to connect. Opens a new window which shows 'Q: Will my application stop working when you make this change? A: It might, yes, it depends on the app itself and how it was coded. Opens a new window shows 'While connections from these older clients will not be blocked, users running Office 2013 after this date can expect to encounter reduced performance, reliability issues, and increased security risks.' I also found Opens a new window which shows that Basic Authentication will be turned off on Octoin favor of Modern Authentication, and 'Outlook 2013 can use modern authentication but requires a registry change'. But, I then found another set of articles which shows the contrary. Opens a new window and here Opens a new window.Īfter reading the articles above, it made me believe Outlook 2013 will not be able to connect after October 13th, 2020. Office 2013 being unsupported is also shown here. This article Opens a new window shows 'Effective October 13th, 2020, Office 365 services (for example Exchange Online, SharePoint Online) will only support Office client connectivity from subscription clients (for example, Office 365 ProPlus), or the following Office perpetual clients: Office 2019 and Office 2016'. Our desktop clients use Office 2013 with Outlook 2013 connected to Exchange Online.

We are a small business and are currently using Exchange Online with 50 user accounts.

Outlook 2013 exchange online