We're going to be setting up Exchange 2010 soon and I was wondering what the recommended size of the mailbox store is. I believe it was 200GB in 2007. Thanks, Scott

Without replication, 200GB. With replication, you can go as high as 2TB. http://technet.microsoft.com/en-us/library/dd638137.aspx With the significant core improvements made to Exchange 2010, the maximum recommended mailbox database size when using continuous replication has increased from 200 gigabytes (GB) in Exchange 2007 to 2 terabytes in Exchange 2010. With more companies realizing the greater value in large mailboxes (from 2 GB through 10 GB), significantly larger database sizes can quickly become a reality. Supporting these larger databases means moving away from legacy recovery mechanisms, such as backup and restore, and moving to newer, faster forms of protection, such as data replication and server redundancy.

Thanks a lot.