You can import Zimbra data to Exchange Server account using Zimbra to Exchange Server Converter. A few features of this Commercial application are Fast data transfer, the ability to transform corrupted files strongly, and the ability to transfer meta properties from an email.
Read More: https://www.kdetools.com/zimbra/exchange/

Migrate Zimbra to Exchange Server

Go to Preferences.
Choose Import/Export.
In the Export option, Chose the Type as Account.
Select all Folders & Items you want to Export.
Finally, Click the Export button.
Choose the Save file option in the dialog box.
Choose the location to Save TGZ Archive & initialize the process.
 

Greeting,
Peter