Forum Discussion
Prevent emails being forwarded to external recipients
I have a customer who would like to have an option for a subset of their users so that they can tag an email, and this will prevent the email being forwarded to external recipients. Is the best way t...
You can also create a policy under security and compliance. Make sure you create a custom policy and set the setting in the attachment if you need more options then the default select advanced and make your selection.
You can also look at this movie for more in depth info:
https://mva.microsoft.com/en-us/training-courses/data-loss-prevention-in-office-365-8390
It is also an option to set a transport rule. Like Nuno said. There is a option to set on all mail send to an external domain. and before it will be send someone needs to approve it. You can also select the domains that need approval before mail can be send to them.
