Outlook 2003 Disconnected when accessing over VPN

[Rising]

I have got 2 users who use a VPN to access Exchange using Outlook 2003 in cached mode. The VPN client is Sonicwall. Both of them access only this 4 or 5 times a month and about 2 or 3 of those times they call me saying they cant connect or they were connected and got kicked out and it will not reconnect. I have serched for this issue everywhere and it seems to me that the problem is with "Too Many MAPI connections". Below is the error message that I am getting:

Task "Microsoft Exchange Server" reported error (0x80040115): "The connection to the Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action."

Task 'Microsoft Exchange Server' reported error (0x8004011d): 'The server is not available. Contact your administrator if this condition persists.'

I am using SBS 2003 with Exchange 2003 Service Pack 2. Thanks for any help.

[Pugsly]

Can you tell us whether your users have thousands of reminders open? You can check some articles about increasing the mapi clients. I guess you have the exact error to do a google search. The account that we were using, we used to encourage that person to click on dismiss all. Reminders of meetings 2 years past does not seem helpful. It seems to happen inside their office and only to one user and for that one user at any workstation.