Hi,

I cannot logon to the exchange server from my Windows XP. I get the message Outlook could not logon. Previously it was working fine. Any idea abt that?

Hi ,
This may occur because of

a)This behavior occurs because the Transmission Control Protocol/Internet Protocol (TCP/IP) stack is initialized incorrectly.

b)This behavior can also be caused if the following registry key is corrupted or missing:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Rpc\ClientProtocols

Refer the below Microsoft link and try the steps mentioned in the link.
http://support.microsoft.com/kb/268575/en-us