For the latest information on Microsoft 365 support for modern authentication, read Updated Office 365 modern authentication. You must configure Microsoft 365 cloud services to use modern authentication protocols by default. Modern Authentication: Cloud services must use modern authentication to use tenant restrictions and block access to all non-permitted tenants. Browser-based Microsoft 365 applications currently support tenant restrictions, as do Office clients that use modern authentication (like OAuth 2.0). #Easybee for window restiction softwareYou must configure the proxy to insert the header containing the list of permitted tenants into traffic destined for Azure AD.Ĭlient software: To support tenant restrictions, client software must request tokens directly from Azure AD, so that the proxy infrastructure can intercept traffic. On-premises proxy server infrastructure: This infrastructure is a proxy device capable of Transport Layer Security (TLS) inspection. The overall solution comprises the following components:Īzure AD: If the Restrict-Access-To-Tenants: header is present, Azure AD only issues security tokens for the permitted tenants. This uses a separate header to the endpoint, and is detailed at the end of the document. For more information about SaaS cloud apps, see the Active Directory Marketplace.Īdditionally, the tenant restrictions feature now supports blocking the use of all Microsoft consumer applications (MSA apps) such as OneDrive, Hotmail, and. If you use SaaS apps with a different Azure AD tenant from the tenant used by your Microsoft 365, make sure that all required tenants are permitted (e.g. This article focuses on tenant restrictions for Microsoft 365, but the feature protects all apps that send the user to Azure AD for single sign-on. Azure AD then only grants access to these permitted tenants - all other tenants are blocked, even ones that your users may be guests in. With tenant restrictions, organizations can specify the list of tenants that users on their network are permitted to access. For example, you may want to allow access to your organization's Microsoft 365 applications, while preventing access to other organizations' instances of these same applications. With tenant restrictions, organizations can control access to SaaS cloud applications, based on the Azure AD tenant the applications use for single sign-on. The Azure Active Directory (Azure AD) solution to this challenge is a feature called tenant restrictions. Blocking these addresses would keep users from accessing Outlook on the web entirely, instead of merely restricting them to approved identities and resources. This approach fails in a world where software as a service (or SaaS) apps are hosted in a public cloud, running on shared domain names like and. Traditionally, companies restrict domain names or IP addresses when they want to manage access. Large organizations that emphasize security want to move to cloud services like Microsoft 365, but need to know that their users only can access approved resources.
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