There are two different approaches that you can opt for migrating Gmail emails to Office 365 mailbox. Either you can perform it manually or you can opt for a more reliable software approach. In this respect, I have recently explored an informative article that explains the detailed manual and a professional approach to migrate Gmail to Office 365 admin center. It clearly explains the entire process to accomplish this task using a manual approach.
However, in some cases, it has been seen that some non-technical users find it difficult to perform this task manually. In that case, this article will also introduce you to a fast and reliable Gmail Backup Software that is a secure way to back up Gmail emails.