We are running Microsoft Exchange 2003 on Windows 2003 Server. Our users connect with Outlook Web Access and Microsoft Outlook. We have been having a problem where the email system would suddenly stop working. When people try to connect to Web Access they have been getting a 503.13 error (picture attached). This error is now becomming more frequent. It's allready happened twice this morning.
We have discovered that restarting the Microsoft Exchange Information Store service fixes the problem and allows users to access their email again. In the past it has happened over the weekend and has lasted for hours maybe even a day or two. So I can't see how it can be a "Server Busy" error as the attached picture suggests, because surely once the error occurs, and people stop using the email because they cant access it, it should reset itself?
If it is due to high demand, how many simultaneous connections can it handle? and how can we work around it?
If thats not the problem, then what is? and how do we fix it?
Thanks in advance