Office 365: Enable mail forwarding to external email domains...

For a society i do some IT administration things - and now something really new: a Office 365 tenant.

First thing was to enable mail forwarding to external email accounts. Sounds easy - hmmm not really.

Configuring the forwarding in outlook.com is quite easy:

But this does not work:

Remote Server returned '550 5.7.520 Access denied, Your organization does not allow external forwarding. Please contact your administrator for further assistance. AS(7555)'

To change this behaviour you have to go to the admin settings:

https://protection.office.com/antispam

Now click policy:

Then choose Anti-spam:

And the chose the third entry and click "edit policy":

And the last step: Change Automatic forwarding to "on"

After you click save the email will now forwarded to external domains...