Does this happen even if you start Outlook in Safe Mode? (hold down CTRL while you click the icon) See if this helps:http://www.officeforlawyers.com/outlook/tsol.htm#safe
Have you tried rebooting your machine?
Do you get an error message of any kind?
What kind of account is this? POP3? IMAP? Hotmail? Exchange? Something else?
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Author: The Lawyer's Guide to Microsoft Outlook
I have the same problem!!
Office Version: Office 2007 Operating System: Windows 7
Outlook Connector is up to date and have had no problems receiving mail from my *****.hotmail.***, *****.live.***, or from my POP3 accounts in Outlook 2007, until last week when I can no longer receive mail from my *****.hotmail.*** account, but I can still receive mail from my *****.live.*** and from my POP3 accounts. Tried adding my *****.hotmail.*** as a new account again, synchronised all my folders etc then gives Synchronization error.Server Id: and SSE Error : (8004a164) with no results!! Has Hotmail stopped being synchronised with Outlook???