Something ISP's/ASP's/MSP's need is the ability to use AD GPO's for certain exchange type policies, especially limits. Imagine an MSP Exchange hosting company with 100,000 seats across 35,000 customers, and they offer tiered mailbox size limits based on what the customer is willing to pay. Since you can't expect to have a paticular customer on their own mailbox stores you'd want to set it at the user object level, but without GPO support you either have to do this manually or write a script that you have to run against an OU. Being able to create a GPO for certain exchange user settings and pointing it at an OU is something we've needed since exchange 2000. Will this be availble in E12?
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<br>Oh, and double or triple the IS limits on Exchange standard, 16GB just doesn't cut it anymore.