IT:AD:Azure:Subscription:HowTo:Link It To Your Office365 Directory Service
Summary
If you created your Subscription's Default Directory from the IT:AD:Azure:Portal:Service Portal and you have an enterprise IT:AD:Office 365 (O365) subscription, you will want to use that and get rid of the first one.
Process
The steps were recorded here: * IT:AD:O365:HowTo:Link Your O365 Directory With Your Subscription