I have a windows 2003 server r2 that is a domain controller and has exchange 2003 standart sp2 installed and one identical server on another location with the same configuration but not a domain controller.On the domain controller I keet getting a warning "The memory settings for this server are not optimal for exchange" event id: 9665.On the non DC I managed to fix this with the /3G /USERVA=3030 in the boot.ini plus the SystemPages value is set to 0 and the HeapDeCommitFreeBlockThreshold set to 0x00040000, it worked fine, as for my other server I tried to use the same settings but I keep getting the same warning everytime the MSExchangeIS service starts. What can I do to get the memory on my DC optimized?

Hi, For Exchange Server computers which are at the same time Active Directory Domain Controllers or Global Catalog servers we also do not recommend setting the /3GB switch in boot.ini. AD database and Exchange compete for the same memory space. We recommend having dedicated Active Directory Domain Controllers or Global Catalog servers. Dedicated Active Directory Servers for Exchange http://technet.microsoft.com/en-us/library/bb123771(EXCHG.65).aspx More information share with you: How you can determine which domain controller Exchange System Manager is communicating with to retrieve this information. http://www.msexchange.org/tutorials/Exchange-System-Manager-Domain-Controller-Selection.html How to optimize memory usage in Exchange Server 2003 http://support.microsoft.com/kb/815372/en-us CPU and memory scalability for Exchange Server 2003 and for Exchange 2000 Server http://support.microsoft.com/kb/827281/en-us Event IDs 9582, 9665, and 9175 may occur on a server that is running Exchange Server 2003 http://support.microsoft.com/kb/947484/en-us Hope it helps. Xiu