How can I make Exchange Online show a policy tip for every message sent outside the organization?

I'm trying to figure out how to make a universal policy tip/warning that will trigger any time a recipient is outside my organization, for the legal team. I see where I can do that with the sensitive information types, but that only triggers based on key words, etc. Any ideas?

I'm not well versed in policy tips--so if the answer is a customized sensitive data type I'd need some guidance, or be pointed towards a template I could use.
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Vasil Michev (MVP)Commented:
There's a MailTip for that:

Set-OrganizationConfig -MailTipsExternalRecipientsTipsEnabled $true

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As for Policy tips, you can use those only for messages containing sensitive information. And rules based on the notify action have some limitations, most likely it will not work for your case. Here's some more info:

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MarktheNerdAuthor Commented:
Great, thank you!
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