While i was working with a customer and this was one of their needs, i decided to blog on how i deployed.
At first, what’s legacy authentication and why i need to block these protocols?
Legacy authentication is a term that refers to an authentication request made by:
Older Office clients that do not use modern authentication (for example, Office 2010 client)
Any client that uses legacy mail protocols such as IMAP/SMTP/POP3.