Migrate Individual box account to M365

Hi Steven, 

Welcome to the Box Community, I'm happy to help!

If you need to migrate your individual Box account into a Corporate or Enterprise Box instance, this can be done following the steps in this article: https://support.box.com/hc/en-us/articles/360044195233--Invite-Existing-Box-User-Message-When-Adding-User 

The Enterprise Admin (or a Co-admin with permission to manage users) needs to manually add you in the Admin Console > Users and Group > Managed users list and this will prompt an invitation for you to join their Box Enterprise account as a managed user.

Once the Admin sent the invitation, you have to login to your Box and accept the invite, once you've accepted, your account will be rolled in to their Box instance.

Let me know if you have any questions and I will do my best to help you!

Regards,