We are running Exchange On-Premise 2013 Server in our organization to manage and store mailbox data of our employees. There are over 2100+ mailboxes in the Exchange Server and 100 of them are large-sized mailboxes. We are looking for a solution to migrate Exchange to Office 365 and we cannot afford losing even a single bit of data. All our emails are so crucial and confidential. So, can anyone please suggest any safe and secure solution to perform migration?