If you decide to try one of the Office 365 trial plans, do not use your real company name. If you decide to change plans afterwards, Microsoft cannot delete your domain name and re-issue it in the right plan.
I have been on P1 for a few months, and after extensive investigation of my requirements, I realised that P1 will not be sufficient for my small business and was now ready to sign up to E3 instead.
Upon logging the call with Microsoft to have my domain deleted from P1 so it can be used on the E3 plan, I was sent the following (with no phone call by the way) :
Make very sure you understand your requirements and the service offering before you sign up using your real company name.
Post Blog Update 11 April 2012 :
2 weeks, 15 phone calls and 13 emails later the problem has been resolved. Tenant deleted and signed up on E3! Thanks Trent at Microsoft for all your help and sticking with it.
Let’s hope it’s not as big an issue to get more space allocated now. 😉