The following have to be adhered.
1. Verify Domain + Change MX Records to Zoho
2. Go Back to Google Workspace - Change the Cloud Settings as given in their settings (Basically Permissions)
3. For Each Individual Inbox,
Enable IMAP + Enable Access to Less Secure Apps
4. Crate User at Zoho
5. Create Migration, then Add User Created in Step 4 to the Migration then "Start Migration"
For a MailBox with Lot of Sent + Incoming e-mails + Mails in Various Labels - Migration is terribly slow. 1 Hour / 1 GB.