![]() What’s the problem with Legacy Authentication? It requires only username and password and we cannot require a 2nd factor of authentication, for example a one-time password. In this post I will not explain how to configure your Conditional Access policies to block Legacy Authentication it but rather how to discover which users are actually running Legacy Authentication so you can evaluate your current usage and why it’s important to fix it. So if you’re in for such a project, contact us and we can assist. This also brings the discussion whether to require Outlook Mobile since this offers more security features which also results in a discussion regarding MDM. And once you’re there, there’s a discussion how to configure your mobile devices since many devices don’t support ActiveSync with MFA. This would also bring the discussion how to configure and roll-out MFA. Once you start blocking it, ActiveSync will stop working for many users. The truth is that it’s more just to start blocking Legacy Authentication. Microsoft has announced the blocking of this on but the biggest problem is that you probably will get (and possibly already have been) breached because of it. Legacy Authentication) for all users and not running MFA? Then you’re extremely exposed to attacks. : Exchange, Office 365 By Jonas Back Translate with Google ⟶Īre you running Exchange Online and still allow Basic Authentication (a.k.a.
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