Wait for the Add-in to appear in Outlook
We all now wait for Microsoft to verify the Web App.
Although Microsoft state 6 hours and it can take 24 hours it typically takes around 2 hours.
You will then find that it appears in Outlook's ribbon menu:

Please click on it and accept the terms and conditions to be assigned a unique ID in the system, which is required to make you an Admin.
Let us know when you have done this by emailing support@cloudfiler.io
Subject: Please assign Admin rights on our new tenant
Body: Please give Admin rights to <list the email addresses of those who need super-user rights>
We can then give you elevated privileges, which you will need to continue with the next stages.
Next Step: Setting up CloudFiler