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, 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

in Exchange 2003 , a client can make 32 sessions to the server. More than that the server disconnects the client. Check for event 9646 , it may be a networking issue. ( especially with wi-fi networks of old type). you may need to reset server connections.. go to ESM and click on your server\./..\database ..\ mailbox store to LOGONS. right click and add appropirate columns . if these connections have exceeeded 32 , you may need to reset the server connections,

http://khurramullah.blogspot.com/2009/07/exchange-2007-mapi-session-exceeded.html

Hi, According to your description, please check if the following thread fixes this issue. http://social.technet.microsoft.com/Forums/en/winserverDS/thread/4c5430f5-43f6-41b4-97d3-03cfb3efa70b Since the issue is caused by system side, you may also create a new thread in Windows 7 forum. Regards, NovakPlease 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.