Other System Requirements
Microsoft Exchange Server 2003 is the earliest version for using Exchange Server with Outlook 2010.

Certain inking features require running Windows XP Tablet PC Edition or later; speech-recognition functionality requires a close-talk microphone and audio output device; Information Rights Management features require access to a Windows Server 2003 with SP1 or later running Windows Rights Management Services.

Connectivity to Windows Server 2003 with SP1 or later running Windows SharePoint Services is required for certain advanced collaboration functionality. Connectivity to Office SharePoint Server 2007 is required for certain advanced functionality.

Internet Explorer 6 or later, 32-bit browser only. Internet functionality requires Internet access (fees might apply).

Actual requirements and product functionality might vary based on the system configuration and operating system.

Grammar and contextual spelling in Outlook is not turned on unless the computer has 1 GB memory.

This product includes both 32- and 64-bit versions for a single computer. We recommend the 32-bit version, which runs great on both 32- and 64-bit versions of Windows. People who routinely use very large documents or spreadsheets that need more than 2 GB of memory may want to run the 64-bit version, but many common add-ins for Office don't run correctly in the 64-bit edition.