To connect Storeshop and 24SevenOffice you need a user with admin rights. The admin user must invite: fabian@storeshop.no as an integration user.
Here’s how to invite new users:
https://support.24sevenoffice.com/hc/no/articles/360022103559-Opprette-Integrasjonsbruker
Let us know when this is done at support@storeshop.no.