Have an interesting one for you. I have a client that has approximately 135 users on one Exchange 2003 SP2 server running on Windows Server 2003 fully patched. The server is an HP ML570 with Dual 3GHZ xeons and 4GB of RAM. We've already added 1 Terabyte of email storage to house the information stores and have about 500GB of free space on that partition. There are two RAID 5 arrays set up with one dedicated to OS the other the information stores.
Performance monitor not showing abnormal loads for MTA queue or RPC's. I have run the exchange Best Practices Analyzer and diagnostic and all it came up with was unusually high RPC's.
My problem is that my users with mailboxes over 3GB in size........I'll wait till you stop laughing.....
using outlook 2003 or outlook 2007 tend to have slow access regardless of whether we enabled cached exchange mode or just download headers in the send/receive.
These are very touchy users and won't accept mailbox limits. Many of them have actually made subfolders in their deleted items folder. I've run offline defrags and integrity checks on all 4 stores which right now total about 120GB. It was up to 150GB before I finally had to demand they get acquainted with "archive."
So I'm looking at archive solutions like GFI mail archiver and the Barracuda archiver. They may not go for it yet they still want their quick performance back.
Should also mention that I have about 35 BlackBerry users that are tied into exchange via a BES 4.0 SP7 server. We also have a voicemail system that can forward to email boxes.
So other than shrinking the mailboxes what can I do to speed up their outlook performance.
I know everything I've said breaks all kinds of best practices rules but I'm just the consultant here. The network admin is unwilling to ruffle feathers so I need a solution that doesn't involve too much pain for the affected outlook users.
As an addendum, users with mailboxes under 3GB seem to have no performance issues.