Edge Office 365

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Hi, I noticed that some of my customers with MS 365 Basic and Business Standard plans can sync their MS Edge information, while others can't. Based in this article, sync only works with plans that include Azure AD Premium P1 and P2, Microsoft 365 Business Premium, and EDU.

Directory Based Edge Blocking (DBEB) lets you reject messages for invalid recipients at the service network perimeter in Microsoft 365 organizations with Exchange Online mailboxes and in standalone Exchange Online Protection (EOP) organizations without Exchange Online mailboxes. DBEB lets admins add mail-enabled recipients to Microsoft 365 or Office 365 and block all messages sent to email addresses that aren't present in Microsoft 365 or Office 365.

If a message is sent to a valid email address in Microsoft 365 or Office 365, the message continues through the rest of the service filtering layers: anti-malware, anti-spam, and mail flow rules (also known as transport rules). If the address doesn't exist, the service blocks the message before filtering even occurs, and a non-delivery report (also known as an NDR or bounce message) is returned to the sender. The NDR looks like this: 550 5.4.1 Recipient address rejected: Access denied.

If all recipients for your domain are in Exchange Online, DBEB is already in effect, and you don't need to do anything. If you're migrating from another email system to Exchange Online, you can use the procedure in this topic to enable DBEB for the domain before the migration.

Edge Office 365 Support

Note

  • In hybrid environments, in order for DBEB to work, the MX record for the domain must point to Microsoft 365 or Office 365 so that email for the domain is routed to Microsoft 365 or Office 365 first.

  • There are additional considerations when using DBEB with mail-enabled public folders. DBEB is not supported for mail-enabled public folders that are hosted in Exchange Online. DBEB is only supported for mail-enabled public folders hosted on-premises. For more information about DBEB and mail-enabled public folders, see Office 365 Directory Based Edge Blocking support for on-premises Mail Enabled Public Folders.

What do you need to know before you begin?

  • Estimated time to complete: 5 to 10 minutes

  • To open the Exchange admin center (EAC), see Exchange admin center in Exchange Online.

  • For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard shortcuts for the Exchange admin center.

Tip

Having problems? How to download civilization 5 for mac. Ask for help in the Exchange forums. Visit the forums at: Exchange Online, or Exchange Online Protection.

Configure DBEB

Office

Edge Office 365 Sync

  1. Verify that your accepted domain in Exchange Online is set to Internal relay:

    1. In the EAC, go to Mail flow > Accepted domains.
    2. Select the domain and click Edit.
    3. Ensure that the domain type is set to Internal relay. If it's set to Authoritative, change it to Internal relay and click Save.

  2. Apple dvd player download for mac. Add users to Microsoft 365 or Office 365. For example:

    • Directory synchronization: Add valid users to Office 365 by synchronizing from your on-premises Active Directory environment to Azure Active Directory in the cloud. For more information about how to set up directory synchronization, see 'Use directory synchronization to manage recipients' in Manage Mail Users in EOP.
    • Add users via PowerShell or the EAC: For more information about how to do this, see Manage Mail Users in EOP or Manage mail users in Exchange Online.

  3. Set your accepted domain in Exchange Online to Authoritative:

    1. In the EAC, go to Mail flow > Accepted domains.
    2. Select the domain and click Edit.
    3. Set the domain type to Authoritative.

  4. Choose Save to save your changes, and confirm that you want to enable DBEB.

Note

  • Dynamic distribution groups do not sync to Azure AD and are therefore blocked by DBEB. As a workaround in hybrid environments, you can create a mail contact with the same external email address of the blocked dynamic distribution group. In cloud-only environments, this workaround will not work. To use dynamic distribution groups that receive email from external senders in cloud-only environments, you need to disable DBEB (change the domain from Authoritative to Internal relay).

  • Until all of your valid recipients have been added to Exchange Online and replicated through the system, you should leave the accepted domain configured as Internal relay. Once the domain type has been changed to Authoritative, DBEB is designed to allow any SMTP address that has been added to the service (except for mail-enabled public folders). There might be infrequent instances where recipient addresses that do not exist in your Microsoft 365 or Office 365 organization are allowed to relay through the service.