Upgrading to higher SharePoint Plans. Hosted SharePoint Foundation 2010/SharePoint Server 2010 Standard/SharePoint Server 2010 Enterprise.
The steps outlined in the document will assist you in upgrading or switching from one SharePoint plan to another.
To download the document click here.
NOTE: If you need to upgrade from SharePoint Foundation to SharePoint Standard or Enterprise; or from SharePoint Standard to SharePoint Enterprise then please contact our support team.