Hi Puneet,
There are lot of factors behind this and lot many analysis required to decide final configuration.
First you have to perform analysis from client side their current system configuration and what actual they want. Then you have to use minimum number of application servers but high configuration if there are lot many concurrent users and just check
once implementation guide.
You have to distibute users in all application servers so that load will be equally shared in all. and you need to check database size also if migrating from old system to new one....if more number of users then install crm and sql on diff. diff. boxes for
better performance.
Thanks,
Note - This analysis as per my knowledge not 100% applicable all the time so please check once MS implementation guide CRM 2011.
Mundra
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