On the General tab in the External URL field, enter the following information: The unique Outlook on the web FQDN you want to use (for example, owa.contoso.com), and then append /owa. After you've configured the internal URL on the Mailbox server virtual directories, you need to configure your private DNS records for Outlook on the web and other connectivity. Under Set up the basics section, enter the details and click Next. You need to be assigned permissions before you can perform this procedure or procedures. In the new EAC, navigate to Recipients > Groups > Mail-enabled security. Resolve issues with shared mailboxes (article), More info about Internet Explorer and Microsoft Edge, Convert a user mailbox to a shared mailbox, To remove members, use the Search box to search for the member if necessary, select the, To give that permission to an additional member, select, To remove the permission from a member, use the Search box to search for the member if necessary, select the. Group moderators: To add group moderators, click Add . Only senders in your organization: When you select this option, only users or groups in your organization are notified when a message that they sent to the group isn't approved by a moderator. The permissions can be set up only within the current organization tenant. Shared mailboxes are used when multiple people need access to the same mailbox, such as a company information or support email address, reception desk, or other function that might be shared by multiple people. Group moderators can approve or reject incoming messages. Estimated time to complete: 2 to 5 minutes. Click Add to display a list of all recipients in your Exchange organization. Use this forum to ask questions and discuss topics related to send and receive connectors, email address policies, accepted and . Require that all senders are authenticated: This option prevents anonymous users from sending messages to the user. To learn more about litigation hold, see Create a Litigation Hold. If you select this check box, messages from external users will be rejected. This example configures the mailbox of Robin Wood to also reject messages sent by members of the group Legal Team 3. Similarly, if you want to place a shared mailbox on litigation hold, the shared mailbox must have an Exchange Online Plan 2 license or an Exchange Online Plan 1 license with an Exchange Online Archiving add-on license. The alias can't exceed 64 characters and must be unique in the forest. Under Message Delivery Restrictions, click View details to verify the delivery restrictions for the mailbox. You can further limit who can send messages to the group by allowing only specific senders to send messages to this group. Click Add and then select one or more recipients. This example changes the primary SMTP address (also called the reply address) for the Seattle Administrators security group from admins@contoso.com to seattle.admins@contoso.com. Click Add to display a list of all recipients in your Exchange organization. This is particularly useful for help and support mailboxes because users can send emails from "Contoso Support" or "Building A Reception Desk." Before you begin Microsoft Graph API Use this section to view or change the email addresses associated with the group. Restrict External Senders To Mail Office 365 Group MailTips can include HTML tags, but scripts aren't allowed. Set the toggle to On, and choose whether to send the reply to people inside your organization or outside your organization. In the Configure external access domain window opens, configure the following settings: Select the Mailbox servers to use with the external URL: Click Add. Select the user you want, expand Mail Settings, and then Select Edit next to Mailbox permissions. For more information, see Recipients in Exchange Online. Senders in the following list: This option specifies that the mailbox will reject messages from a specified set of senders in your Exchange organization. Under Members, you can add members by clicking Add . The default configuration is "Automatic system-controlled.". Does the Microsoft 365 Group have shared mailbox capabilities or it's just like a distribution list, combined with a calendar, file sharing etc. Internal emails to the shared mailbox are fine. Only senders in the following list: This option specifies that the user can accept messages only from a specified set of senders in your Exchange organization. Shared Mailbox - external sender? This includes external users that are outside of your Exchange organization. We can use the Exchange Online Powershell cmdlet Set-UnifiedGroup to set the people outside the organization to send mail to a specific group. This option will not work with mail-enabled security groups because of security-related limitations.