My Exchange 2003 server (running under Windows Server 2003 R2) has three different mail stores set up for three different locations. The first store contains 145 individual mailboxes, the second store contains 217 individual mailboxes, and the third store contains under 20 mailboxes. The overall sizes of these stores, respectively, are 115GB, 103GB, and 13GB.
The problem I run into is that every few weeks (always on a Sunday night for some reason) the two larger stores go offline. The event logs usually indicate that Exchange detected a possible problem with the stores, and so it took them offline while it ran whatever corrective actions it needed to run to ensure the data was good.
It seems odd to me that the problem is only taking place with the larger two mail stores. The larger stores have also been around for about a year, while the smaller store has only been around for a few weeks.
The question I have here is this: are there any limits on either (A) the number of mailboxes that can be contained within a single store before corruption is likely, or (B) the overall size of a store itself before corruption is likely?
My thinking here is that perhaps I need to create numerous new stores and divide up the larger stores into these. Ie: Site A Store A, Site A store B, Site B Store A, etc... If there are limits that are known to cause issues if they are exceeded then this would seem to be the best course of action.