The final date to run migrations using Migrator will be November 25th, 2015. In order to ensure that your migrations have sufficient time to complete, we recommend that you begin your users’ migrations no later than November 20th.
The more data in each user’s source Google Apps account, the longer the migration will take to complete. It is extremely difficult to estimate the duration of a migration but we can provide an approximate rate of transfer for a user’s account. For all services other than Gmail, we generally see speeds of 500MB to 1GB per user per hour. For Gmail, Migrator can move around 12,500 emails per user per hour.
You will be able to log in to your Migrator account until Friday, December 18th in order to view the status of your migrations or export records.