One of the best utilities ever created for Exchange is EXMerge. You can get the latest version of this tool here, where it is listed as the Mailbox Merge Wizard: http://www.microsoft.com/exchan...
Updated Jul 01, 2019
Version 2.0
Blog Post
How much de-duping can ExMerge really do, when it's used as a migration or merge tool between one old server store and one new? The scenario is that you've got an old 5.5 store on ServerA, you 'exmerge' (for want of a better phrase describing the act of using ExMerge!) everybody's mailbox to a pst file each somewhere, and then 'exmerge' them all into a shiny new 2003 store on ServerB. ServerA's store had a single instance ratio of say, 1.8 to 1. What will ServerB's single instance ratio be with the new version of ExMerge?
In the past (like with everybody's Exchange 2000 migration), it was always 1 to 1 in the new store; in other words single instance storage of all objects had effectively been removed by the use of a PST delta in the ExMerge two step process...
Cheers
In the past (like with everybody's Exchange 2000 migration), it was always 1 to 1 in the new store; in other words single instance storage of all objects had effectively been removed by the use of a PST delta in the ExMerge two step process...
Cheers