Hi, In our office, we have 8 PCs running Windows 7 and Outlook 2007. There is also a server running Small Business Server 2003 and Exchange Server 2003. Previously, we had old PCs running Windows XP and Outlook 2007, and did not have any problems connecting, but at the moment, Outlook running on three of the PCs displays its status as "Disconnected from Microsoft Exchange" randomly at least once a day. Restarting the PC sometimes fixes the problem, but not always. There were a number of issues I addressed on the server by using Microsoft Exchange Best Practises Analysis Tool, but the problem with these PCs still exists. I have searched through the application and system event logs on the PCs, and the only corralation I have found is that around the times of the disconnections, the following error is displayed - SChannel The following fatal alert was generated: 10. The internal error state is 10. - System - Provider [ Name] Schannel [ Guid] {1F678132-5938-4686-9FDC-C8FF68F15C85} EventID 36888 Version 0 Level 2 Task 0 Opcode 0 Keywords 0x8000000000000000 - TimeCreated [ SystemTime] 2010-12-16T13:31:38.098155500Z EventRecordID 4097 Correlation - Execution [ ProcessID] 532 [ ThreadID] 572 Channel System Computer (****PC Name****) - Security [ UserID] S-1-5-18 - EventData AlertDesc 10 ErrorState 10 Can someone help me trace and resolve the issue ? Any help would be appreciated. Thanks GW

Hello Uktechwizard, Thanks for the post! Is there any related error event logs on your server side? Temporarily turn off the firewall to check it the issue persists. Regards, MiyaThis posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi Miya, Thanks for your response. I matched the event logs on the server to the dates/times the errors occur on the PCs, and there is nothing server side that is out of the ordinary. As a test, I disabled the firewall on one of the affected PCs as few days back, but the issue still persists. Regards GW