Turn off Cached Exchange Mode
1. On the Tools menu, click E-Mail Accounts, click View or change existing e-mail accounts, and then click Next.
2. In the Outlook processes e-mail for these accounts in the following order list, click the Exchange Server e-mail account, and then click Change.
3. Under Microsoft Exchange Server, clear the Use Cached Exchange Mode check box.
4. Exit and restart Outlook.
Ale podmínkou je používání Exchange serveru, což možná není tvůj případ?