To migrate the Google Workspace mailbox to Office 365, you can use the best
G Suite Backup Tool . It is the most secure and trusted utility to backup the entire G Suite data. This tool has an advanced feature to backup multiple G Suite accounts simultaneously. It allows you to save G Suite emails without attachment files. This utility can save G Suite emails, calendars, contacts, drives, and other data with accuracy and data integrity. Additionally, it can
export Google Workspace email to PST , MBOX, MSG, EML, and other formats. Furthermore, you can try the free demo version of this tool to evaluate its working.