Best Method to Move Google Workspace to Microsoft 365 with Attachments

When moving from Google Workspace to Microsoft 365, preserving email attachments is just as important as transferring the emails themselves. Business documents, invoices, contracts, reports, and shared files are often stored as attachments, so losing them during migration can create unnecessary problems. The best migration method should ensure that both emails and their attachments are transferred completely.
Before beginning the migration, prepare your Microsoft 365 environment by creating user accounts and assigning the appropriate licenses. It is also important to create a backup of your Google Workspace mailboxes before moving any data. This backup acts as a safety measure if the migration needs to be repeated or if any information must be restored later.
For smaller migrations, Microsoft's built-in migration tools may be sufficient, although they require several manual setup steps. If you need to move larger mailboxes or multiple user accounts while keeping attachments intact, the Aryson Google Workspace Backup Tool provides a more streamlined approach. It can migrate Google Workspace mailbox data directly to Microsoft 365 while preserving email content, attachments, folder hierarchy, and mailbox structure. This helps reduce manual effort and improves migration accuracy.
Once the migration has finished, compare the source and destination mailboxes to ensure attachments open correctly and important folders contain all expected emails. It is also recommended to ask users to verify their mailboxes before permanently switching to Microsoft 365. Testing a few large attachments is a good way to confirm that everything has been transferred successfully.