Microsoft is sunsetting Legacy Authentication Protocols. It’s no secret, this is long overdue. They open you up to the easiest hacks, in fact, more than 99 percent of password spray attacks use legacy authentication protocols.
So what’s holding you back? Do you even know who is using legacy protocols in your Microsoft 365 tenant? The biggest culprit is people connecting to their Exchange Online mailbox using an iOS device.
The time is NOW to disable legacy protocols!
Does this sound like a daunting task in your complex environment? Don’t fret! CoreView has you covered. Register now to hear how you can:
Don’t get caught with your legacy protocols down!
Legacy authentication - what is it? It's essentially any mechanism that does not support multifactor authentication (MFA) or modern authentication. But it is all about security.
Why is it important?
What are security defaults?
It requires administrators to use multifactor authentication. It blocks legacy protocols, requiring users to perform multifactor authentication when necessary. It also protects privileged activities like access to the Azure portal.
It's tenant wide - so it is imperative to make sure you know if users aren't using it. Microsoft recommends that if you have complex security requirements, using conditional access, or you have Azure active directory premium, that you not use security defaults and use conditional access instead.
If you have older PowerShell scripts, they're going to be using some of those legacy authentications, especially if you're going against Exchange.
What about printers or multifunction devices where you scan it and have the PDF emailed. They're probably using SMTP authentication.
There's a number of reasons why you might need to add those exceptions and have that support there. Especially if it's mission-critical.
If you have Office 2013, you can enforce modern authentication, but you have to update the registry. Office 2010 does not support modern authentication. If you have users out there, or, you know, if your corporate standard is still Office 2010, you have to leave it enabled for now.
Although there might be a business reason for using Office 2010, but you can also make a security argument for why it's putting your company, your tenant, and your data at risk.
There are a couple ways that you can check in Microsoft.
Another way is conditional access policies. (This does require Azure Active Directory Premium).
Final method is per user. Where you can go in and enforce multifactor authentication at the user account level. And then the next time they log in, they have to use MFA.
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