Pay As You Go IT offer three Office 365 Plans:
1 Essentials doesn't come with the desktop version
of Office, however it is compatible with Office suites from 2007 onwards (functionality
with 2007 is slightly limited).
2 Office 365 Standard does not come with Exchange,
so you won't have access to email or calendar through the Office 365 Online portal,
however, you will still be able to use whatever email client you currently use.