How to notify the users that they are adding/sending an email to an external recipient/receiver for Outlook & OWA from admin GUI or any PowerShell or MS Graph?

Vinod Survase 4,736 Reputation points
2023-08-13T15:52:40.9833333+00:00

How to notify the users that they are adding/sending an email to an external recipient/receiver for Outlook & OWA from admin GUI or any PowerShell or MS Graph?

Note: I would want to enable this as admin for whole tenant and manage it.

Microsoft 365
Microsoft 365
Formerly Office 365, is a line of subscription services offered by Microsoft which adds to and includes the Microsoft Office product line.
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Microsoft Exchange Online
Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Yuki Sun-MSFT 41,051 Reputation points Microsoft Vendor
    2023-08-14T06:16:38.4566667+00:00

    Hi @Vinod Survase ,

    How to notify the users that they are adding/sending an email to an external recipient/receiver for Outlook & OWA from admin GUI or any PowerShell or MS Graph?

    Aside from the method shared by Manu, You can also connect to Exchange Online Powershell and then run the command below to turn on the External Recipients MailTip:
    Note: It may take some time for the change to take effect.

    Set-OrganizationConfig -MailTipsExternalRecipientsTipsEnabled $true

    Reference:

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  1. Manu Philip 18,166 Reputation points MVP
    2023-08-13T16:33:37.0233333+00:00

    You may use the following mail flow rule to send a notification to the sender, if they send an email to an external recipient by any of method

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    --please don't forget to upvote and Accept as answer if the reply is helpful--

    2 people found this answer helpful.
  2. Arjen van den Berg 0 Reputation points
    2024-09-25T07:46:46.54+00:00

    I didn't find the action of: Notify the sender with a Policy Tip in mail flow rule.

    Same.

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