We are testing backups and restores using Tivoli Storage Manager Exchange TDP. So far I am happy with the results but I am testing it on a newly created Exchange 2007 CCR server with only 3 mail boxes in one mail store. Does anyone have experience with TSM and Exchange 2007 and can tell me how it is going for you? Like is performance affected at all during backups or restores? It's easy enough to do the backups and restores at least.