Can Google Apps Sync help me import Microsoft® Exchange data to Google Apps?
Yes. If your Exchange account is available, you can import its current data directly into your Google Apps account. Otherwise, you can save your Exchange data as a PST file and import that. You can import data when you install Google Apps Sync, or import it later. Data is imported to Outlook then synchronized with your Google Apps account in the cloud. Note, however, that if all you want to do is import data to Google Apps—that is, you don’t plan to keep working in Outlook afterwards—use Google Apps Migration for Microsoft Outlook®, instead of installing Google Apps Sync.