Microsoft will stop basic authentication on October so I built a guide on how to handle it

Although most of the recent tenants don't need to worry about it because by default legacy clients are blocked, I hope it's helpfull for those in the "game for a long time".

We had to help users to migrate from Basic Authentication to Modern Authentication so we've made an article on how to do it:

https://betterlicenses.com/blog/how-to-migrate-basic-auth-to-modern-auth-microsoft-365