Allowing and blocking invitations for Azure AD B2B

This recipe shows how to allow or block Domain Name System (DNS) domain names for Azure AD B2B invitations.

Getting ready

To complete this recipe, sign in to the Azure AD tenant with an account that has the Global administrator role assigned to it. If the organization uses the Azure AD PIM feature, activate the Global administrator role in advance.

How to do it...

Perform the following steps to allow or block Azure AD B2B invitations:

1. Navigate your browser to https://aad.portal.azure.com.
2. Sign in with an account in Azure AD that has the Global administrator role assigned.
3. Perform MFA when prompted.
4. In the left navigation pane, click Azure Active Directory.
5. In the Azure Active Directory navigation pane, click User settings.
6. Follow the Manage external collaboration settings link.
7. In the External collaboration settings pane, under Collaboration restrictions, select either the Deny invitations...