Hello Kuronuma
My name is Muffuh Bertrand and i'm an independent advisor and a Microsoft user like you.
Regarding your issue, please note Modern authentication in Microsoft 365 enables features like multi-factor authentication (MFA), certificate-based authentication, and OAuth-based authentication for applications like Outlook and Teams. It enhances security by requiring users to reauthenticate periodically or when accessing sensitive resources.
If you wish to disable modern authentication or adjust its settings, including reducing the token lifetime (the period after which users need to reauthenticate), you typically need administrative access to the Microsoft 365 Admin Center or Azure Active Directory (Azure AD) portal. Here’s a general approach to disabling modern authentication:
- Access Microsoft 365 Admin Center or Azure AD Portal: Sign in with administrative credentials.
- Navigate to Azure Active Directory settings: Depending on your setup, you may find these settings in the Azure portal under Azure Active Directory > Security > Conditional Access, or directly in the Microsoft 365 Admin Center under Settings > Org settings > Security & privacy.
- Disable Modern Authentication: Look for settings related to modern authentication, often found in Conditional Access policies or Authentication methods. You may have options to disable it entirely or adjust settings such as token lifetimes.
Keep in mind that turning off modern authentication affects the way users authenticate to Microsoft applications, and it is generally not recommended due to security vulnerabilities associated with basic authentication.
If you also want to adjust settings regarding the authentication period, you typically cannot set it to 0 days. The default authentication period is indeed often set to 90 days, and this is primarily determined by security policies within Microsoft 365. For more granular control over user sessions, you might look into configuring specific conditional access policies that meet your organization's needs.
Hope this helps. Please feel free to repost or submit your vote. Your vote will make your post superior content and help other users in the community facing the same issue.
in good faith,
Bertrand