Exchange Server 2010


We have a exchange server 2010 but have not added a lot more users than first installed and think its feeling the strain, what is the best way to increase resilience and also improve speed to the end users, do i just add another exchange server and move the users to the new datastore on the new server and split the load ? any help or guidance from previous will be great.

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Will SzymkowskiSenior Solution ArchitectCommented:
One of the biggest things that slow down the performance of Exchange is the IOP's associated to the storage. What I would recommend is use the link below which will provide Sizing recommendations based on your environment, how many users, mailbox sizes etc.

Another thing to take in to consideration is having your users use Cached Exchange mode for Outlook. This helps in a few ways...
- outlook uses most of the processing power from the client machine rather than network resources using online mode
- searching is also better because Outlook in cached mode will use the clients local search to search for mail items in the OST


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Will's suggestions are the first to be implemented. Storage performance is the main area of complaints.
After that:
You can separate the LUNS (storage) for the transaction logs. Then change the path for the logs.
Have another DB on the same server on a different LUN, with transaction logs again on another LUN or hard disk.
It improves the performance. Then having another server  and moving the second database to the second server will help you further.
Then you can configure a DAG (load balancing) to improve in other ways.
Lee W, MVPTechnology and Business Process AdvisorCommented:
What's the bottleneck?  What research and analysis have you done to determine where your problem is?  How many users are on the server?  Is it physical or virtual?  What's your disk subsystem?  How much RAM?  CPU?  What's the network look like?  How heavily is mail used?  Are you using an Antivirus on the Exchange Server?  Is it configured properly?  What's your CPU usage look like?  You really need to provide more information for a good answer to be offered.
Seth SimmonsSr. Systems AdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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