You can import Zimbra to Office 365; you can try manual solutions and third-party solutions. KDETools Zimbra to Office 365 Converter is the most recommended software that easily import Zimbra files to PST, MSG, EML, HTML and PDF file format. The application carefully import emails, email properties, and attachments to Outlook PST.
Read More: https://www.kdetools.com/zimbra/office-365.html