02-26-2019 03:09 AM - edited 02-27-2019 02:35 AM
Hi @Jørgen Koch
Thanks for trying.
Here is what we found in the Admin help
In the Admin center, go to the Subscriptions page, or choose Billing > Subscriptions.
If you're using Office 365 Germany, go to this Subscriptions page.
Choose the subscription name, and then choose More actions > Edit VAT number.
On the Edit your service usage address page, enter your VAT ID in the VAT number box, and then choose Submit.
We would love to know about your experience!