Log in to your Microsoft Exchange account using Outlook or Outlook Web App (OWA).
Once you are logged in, navigate to the "File" or "Settings" menu.
In Outlook, click on "Office Account" or "Account Settings," and in OWA, click on the settings icon (usually represented by a gear or cog symbol).
Look for an option such as "About," "Help," or "About Microsoft Exchange" and click on it.
A window or page should open, displaying information about your Microsoft Exchange version, including the specific version number or name.