Here is where you keep information about your company, including the email address of the technical contact, up to date. In small companies, it's often the case that the CEO or owner of the company assigned themselves as the technical contact when the Office 365 tenant was created, and later, they ended up flooded with error messages that clogged their inbox and should have been going to IT, anyway. You can fix that issue here:
There are other settings that affect your organization here. You can decide what the release schedule for your company will be: Will you get the new Microsoft releases ...