Exchange Online (German Cloud) by: Microsoft category: Exchange Large, 100GB mailboxes that can send mesages up to 150MB in size, with contacts, shared calendars, and spam and malware protection that stays up to date View Plans
Exchange Online (Plan 1) (Enterprise) by: Microsoft category: Exchange Professional e-mail features with 50 GB mailbox per user
Exchange Online (Plan 2) (Enterprise) by: Microsoft category: Exchange All features of Exchange Online Plan 1 plus unlimited storage