Microsoft Mfa Don t Ask Again for Days

Today a brusque blog near MFA prompts, session lifetime, and cookies. This will give you an thought of how you lot tin can tune the cease-user feel and where to configure these settings.

Session lifetime in Azure Advertizement is ofttimes mistaken. When y'all start working with Azure AD, Conditional Access, and Multi-factor hallmark, there are a couple of things you should know. The Azure Advertizement defaults are pretty loose. When you leave every setting to default, the user experience is pretty practiced. Once you logged in to Part 365, your session can be re-used for ninety days. During that time, yous are not prompted for your password, bold that is it not changed over fourth dimension.

When organizations deploy MFA, there is one question that always comes back: "how oft should we prompt our users for MFA?" These questions are mostly based on gut feeling. Prompting your users for credentials or MFA more often does non mean that you are more secure. When users are used to entering credentials equally a routine, they are more similar going to fall for phishing attacks. So, think twice when you consider tuning these settings.

Keep me signed in (KMSI)

This setting is not easy to find only has a major impact on the user experience. You can configure this setting in the company branding department nether Azure Agile Directory -> Company Branding

The Azure AD sign-in flow gives users the option to remain signed in until they explicitly sign out. This doesn't change Azure Ad session lifetime just allows sessions to remain active when users shut and reopen their browser. This will create a persistent cookie on the endpoint, so the users' session is stored. The Azure AD default for browser session persistence allows users on personal devices to choose whether to persist the session past showing a "Stay signed in?" prompt later successful hallmark.

Multi-cistron Hallmark

When you prompt your user for MFA, there is some other setting that is coming into the movie. This setting is also not that like shooting fish in a barrel to find. It is stored in the MFA service settings. The call up Multi-Factor Hallmark feature sets a persistent cookie on the browser when a user selects the Don't ask over again for X days option at sign-in. The user isn't prompted again for Multi-Factor Authentication from that same browser until the cookie expires. If the user opens a different browser on the same device or clears their cookies, they're prompted again to verify.

This setting is enabled past default. The user experience volition look like this:

Persistent browser session

Using Conditional Access y'all can configure whether a session needs to be persistent or non. This will override the setting in Company branding. Using this setting you tin make different policies for different scenarios. Yous can distinguish between users or managed and non-managed devices for example. This will only work correctly when y'all enable this for all cloud apps.

Sign-in frequency

You can manage the frequency of sign-in for Azure Ad. Sign-in frequency setting works with apps that have implemented OAUTH2 or OIDC protocols co-ordinate to the standards. Most Microsoft native apps for Windows, Mac, and Mobile including the following web applications comply with the setting.

• Word, Excel, PowerPoint Online
• OneNote Online
• Office.com
• O365 Admin portal
• Exchange Online
• SharePoint and OneDrive
• Teams web client
• Dynamics CRM Online
• Azure portal

If you have configured different Sign-in frequency for different web apps that are running in the same browser session, the strictest policy volition be applied to both apps because all apps running in the same browser session share a single session token.

What about FIDO2?

When users sign in using FIDO2 security keys, they volition not get prompted for MFA and/or the option to stay signed in. FIDO2 stands for stiff authentication on itself, so information technology will satisfy the second-factor authentication equally well. All the other settings will apply, such as sign-in frequency and browser persistency.

Nether the hood

If you desire to see what's going on under the hood, you tin can utilize Fiddler and the developer tools in your browser.

Decision

As you lot can come across there are quite some settings that permit you to melody the end-user experience for session lifetime and MFA requests. I hope these tips tin help y'all in designing your Azure Advertizement strategy. Hopefully you'll observe the balance between the best user experience and the all-time security measurements. Keep in mind that you should non design this based on gut feeling. Endeavor to carp the hackers, non your users.

Stay safe!

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Source: https://janbakker.tech/sure-keep-me-signed-in-and-dont-prompt-for-mfa/