Aug 17 2020
With regards to Microsoft ending the support for Basic Authentication access to exchange online API's for office 365 customers.
As per these articles:
We have applications that are connecting to SMTP Servers (via smtp.office365.com port 995) and IMAP servers (outlook.office365.com port 993)
using .NET libraries such as :
1. System.Net.Mail from Microsoft. e.g. SMTPClient
2. MailKit.Net.Imap from MIT. e.g. IMAPClient
Does it mean that our applications will no longer work?
Aug 18 2020
Yes. You will need to update them to support modern auth for SMTP/IMAP. Follow the EHLO blog to get details on this: https://techcommunity.microsoft.com/t5/exchange-team-blog/announcing-oauth-2-0-support-for-imap-and-...