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      Defender for Email Tenant Block

      This guide will show an administrator how to specify a domain or address that users will no longer be able to communicate with.

      Role Requirements

      Procedure Scope: Administrators

      Required Group Membership: Admin.Security

      Handbook Reference

      Package: TBD

      Domain: TBD

      Modifies: TBD

      Defender for Email Tenant Domain Block

      1. Navigate to the Tenant Allow/Block Lists – Microsoft Defender portal, locate and select the Block action under the Domains/Addresses tab. A flyout will be displayed where you will be able to specify either the entire domain or specific addresses associated with a domain (max limit of 20) within the Add domains & addresses field. Specify the timeframe as Never Expire from the Remove block entry after dropdown. Lastly provide a reference point for fellow administration on why the block has been instated under the Optional note field. Select Add to finalize the block.

      Need Assistance?

      Reach out to your Customer Success Manager to discuss how a Sittadel cybersecurity analyst can assist in managing these tasks for you. New to our services? Inquire about arranging a consultation to explore optimizing your Azure environment for painless management.