Under the present invention, an initial distribution list of electronic message recipients within an organization undergoing an IT migration is generated using a personnel directory of the organization and at least one selection criterion. Once initial electronic message recipients are known, messages will be generated and sent using information from a mailing database and a designated schedule. User records for each of the initial electronic message recipients will be created in an inventory database and will include user information from the personnel directory as well as message information. Based on responses to the initial electronic message, follow-up and final electronic messages can be sent to respective distribution lists, and corresponding information stored in the user records of the inventory database.