Hi All, Can you please share your experience ? Planned Exchange 2010 enviroment: - 500 users - No DAG - All users will use Voice Access/UM - All users will have archive feature (10Gb per user) - All users can be connected via Outlook Anywhere (RPC over HTTPS) We will use iSCSI disks for mbx db. Current enviroment: Exchange 2007. CAS/MBX/HT/UM roles are placed on one HP server. ISA 2006 as publishing server on the separated server. Server's configuration: DL360 G5 12Gb ram 2 CPU SAN iSCSI luns for mbx databases I checked HP Sizer for Microsoft Exchange 2010. It said, we need for my planned Exchange 2010 configuration two HP servers: DL360 G6, 1CPU, 16Gb ram for CAS/MBX/HT DL360 G6, 1CPU, 4Gb ram for UM If I change UM role assigment to one server, it recommended one server DL360 G6, 2CPU, 16GB ram. Will one DL360 G6/16Gb ram/2CPU process 500 users with UM and RPC over HTTPS ? Will I have any performance issues ? I read, RPC over HTTPS will add 20% overhead. The same questions for 350 users if there will be performance issue for 500 users. Thanks for advicesmcse^4

Hi Alternate, There are several tools to help you to size you Exchange organzation: Exchange 2010 Mailbox Server Role Requirements Calculator http://msexchangeteam.com/archive/2009/11/09/453117.aspx Tools for Performance and Scalability Evaluation http://technet.microsoft.com/en-us/library/dd335108.aspxPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

I tried 'Exchange 2010 Mailbox Server Role Requirements Calculator', but it doesn't help in my configuration (SAN LUNs and hardware snapshots). It said, I need 8 GB ram. At the moment Ex 2007 server has got 12Gb ram for 350 users. When there was 8Gb ram, we had memory issues, UM stopped working. We will enable UM for all users in Ex 2010. It will increase usage of Exchange server. Also will enable Outlook Anywhere (RPC over HTTPS). I don't see the accurate sizing tools. mcse^4

Have you checked with the Tools from HP and Dell http://h20338.www2.hp.com/ActiveAnswers/us/en/sizers/microsoft-exchange-server-2010.html http://advisors.dell.com/advisorweb/Advisor.aspx?advisor=b6372fc5-7556-4340-8328-b8a88e2e64b2-001ebc&c=us&l=en&cs=g_5

Thats correct. Go and complete your spreadsheet and make sure the Inputs tab says what you want it to say and youre very sure youve written everything out properly. Then give that to your SAN vendor and their specialist will spend an hour on the phone with you talking about snapshots and any potential replication to DR site that you may (or may not) have. Actually you wont be talking to your SAN vendor themselves since you are far too small for their specialists. All vendors have a Channel relationship so a local reseller will help you tweak the numbers for snaps and such. "Alternate" wrote in message news:d41f58ed-127f-4388-b051-38a4ab8cdaaa... I tried 'Exchange 2010 Mailbox Server Role Requirements Calculator', but it doesn't help in my configuration (SAN LUNs and hardware snapshots). It said, I need 8 GB ram. At the moment Ex 2007 server has got 12Gb ram for 350 users. When there was 8Gb ram, we had memory issues, UM stopped working. We will enable UM for all users in Ex 2010. It will increase usage of Exchange server. Also will enable Outlook Anywhere (RPC over HTTPS). I don't see the accurate sizing tools. mcse^4 Mark Arnold, Exchange MVP.

Hi all , I need some one to help me out for the server sizing of 350 users and mailbox size would be 2GB/mailbox.I need to install all the roles. Please suggest me if i can install all the roles (except edge server) on 1 single OS. also specify the sizing for edge transport role. Please tell me the hardware requirements and also let me know if its recommended to install all roles on same OS. Thanks You.