The project began with the team in England who immediately had problems. Six weeks past and the England team migration was still not complete and those users migrated were having constant problems connecting and receiving emails, internally and externally. Per the project plan, the US team was due to start its migration. The consultant started the US team knowing of the existing problems in England. This time, the executive team, located in the US, was effected. Similar problems occurred for a week, then the company reached out for help.
We came in for a quick discovery and stayed for their fix.
It took about 20 days to move all the e-mail but there were no outages or problems during those 20 days. In the morning, people were told they would be moved that evening. When they came in the next morning their data was migrated. .