Finally it’s here. The Switch plans button in Office 365, and you can do the switch your self almost without knowing what you are doing.

The Office 365 technology blog explains it very good, so I will not write it all over again.

http://blogs.office.com/b/office365tech/archive/2013/12/19/you-can-now-switch-plans-to-a-different-office-365-service-family.aspx

For a more in dept article, read more at Microsoft Office Support

http://office.microsoft.com/en-us/office365-suite-help/can-i-switch-to-a-different-office-365-plan-or-subscription-HA104031833.aspx