Restrict sign in to Teams to accounts in specific tenants

UserNeeds changes for IntuneString_Teams_SignInRestriction_Policy

Supported on SUPPORTED_Windows7 (defined in the Windows templates)

5568.1000

What it does

This policy setting allows you to control the accounts that can be used in Teams on managed devices running Windows. If you enable this policy setting, users will only be allowed to sign in with accounts from Azure Active Directory (Azure AD) tenants that you specify. You can enter a comma separated list of tenant IDs. The policy setting applies to all ways that the user signs in, including first and additional accounts on versions of Teams that support multiple accounts side by side. The policy setting is also enforced when users sign out and sign back in. If you disable or don't configure this policy setting, Teams will continue to allow users to sign in with work or school accounts, or personal Microsoft accounts. Important: This policy setting only restricts which users can sign in. It does not restrict the ability for users to be invited as a guest in other Azure AD tenants, or switch to tenants they were invited to. Note: This policy does not apply to Teams web app.

What it writes

Hive: HKEY_CURRENT_USER
Registry key: software\policies\microsoft\office\16.0\teams

Why it needs changes for Intune

Policy references a Windows supportedOn definition.
ADMX-INTUNE-WINDOWS-SUPPORTEDON-REFERENCE

Options

Option	Type	Registry value	Allowed values
Tenant IDsRequired	Text	`restrictteamssignintoaccountsfromtenantlist`	Up to 255 characters

Configure and deploy

Choose a state and the option values; the output below is generated from the template for exactly that.

Fix the highlighted options to generate output.

History 1 retained release

5568.100010 Aug 2026
- Already present in the first release ChangeIntel keeps.

Template

Internal name: String_Teams_SignInRestriction_Policy
Namespace: Teams.Office.Microsoft.Policies.Windows
Template file: teams16.admx
Release: Microsoft 365 Apps 5568.1000 · file set 8be05d876aae137d…

Definition, editor controls and support

Definition

<policy class="User" displayName="$(string.String_Teams_SignInRestriction_Policy)" explainText="$(string.String_Explain_Teams_SignInRestriction_Policy)" key="software\policies\microsoft\office\16.0\teams" name="String_Teams_SignInRestriction_Policy" presentation="$(presentation.Teams_SignInRestriction_Policy)" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="Teams.Office.Microsoft.Policies.Windows:L_Teams" />
      <supportedOn ref="Microsoft.Policies.Windows:SUPPORTED_Windows7" />
      <elements>
        <text id="RestrictTeamsSignInToAccountsFromTenantList" required="true" valueName="restrictteamssignintoaccountsfromtenantlist" />
      </elements>
    </policy>

Editor controls

<presentation id="Teams_SignInRestriction_Policy" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
        <textBox refId="RestrictTeamsSignInToAccountsFromTenantList">
          <label>Tenant IDs:</label>
        </textBox>
      </presentation>

Supported platforms and category

Teams.Office.Microsoft.Policies.Windows:category:L_Teams
<category displayName="$(string.L_Teams)" name="L_Teams" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
Teams.Office.Microsoft.Policies.Windows:unresolved:Microsoft.Policies.Windows:SUPPORTED_Windows7
<unresolved reference="Microsoft.Policies.Windows:SUPPORTED_Windows7" />
Teams.Office.Microsoft.Policies.Windows:category:L_Teams
<category displayName="$(string.L_Teams)" name="L_Teams" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
<strings><string id="Teams.Office.Microsoft.Policies.Windows:L_Teams">Microsoft Teams</string></strings>