We are about to make an acquisition of a company and would be interested in comments on a procedure to follow when looking at the migration. i.e. best practice to merge. We run already with large domain 10,000 users with a global footprint. What is best practice to migrate them into our domain based on the fact they currently have communications, Exchange, file and print, voip etc set up at 2 locations. What to do with old domain emails, files. How to handle old emails? How to handle VOIP migration. Just looking for general ideas based on experience and best approach.