If you want to migrate Zimbra to Gmail then, you can try any professional software like KDETools Zimbra to Gmail Migration Tool. This tool provides various advanced features such as:
- The tool migrate Zimbra to Gmail, G Suite, Google Drive and etc.
- The tool preserves Zimbra items such as emails, contacts, calendar, folder, sub-folder, notes, journals, and etc.
- The application also supports email servers like Office 365 and Exchange Server accounts.
- The software is also compatible with Windows versions such as Windows 10, 8, 7, XP, Vista and etc.