SBS doesn't follow the rules……
You need to allocate more memory manually.
From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Danny
Sent: Tuesday, September 18, 2007 1:01 PM
Subject: [ExchangeList] Store.exe only 89MB post-ExBPA memory changes
Been following the ExBPA (Exchange Best Practices Analyzer) memory setting recommendations on an SBS 2003 SP1 server with Exchange Server 2003 SP2 installed. After the reboot and all 20 users (some with very large mailboxes) store.exe is only using 89MB of memory. The HeapDeCommitFreeBlockThreshold setting is at the recommended 0x00040000 per KB http://support.microsoft.com/kb/815372/. What else would limit the size store.exe? We are obviously seeing limited performance on the store.