To access this download, log into https://support1.na.sage.com/selfservice/microsites/microsite.do and in the search field type Download Sage X3 VT Web Server 2.42.1.2. Click Search.
For a complete list of available Sage X3 full-product downloads and patch updates, see the Sage X3 Download Portal. To access the Sage X3 Download Portal, go to https://us-kb.sage.com/portal/ss/?tabid=3&searchaliases=custom_us_xthree, and click the big green "Download Sage X3" button.
REMINDER: If you use third-party products that integrate with Sage X3 or ISVs, check with the vendor of your third-party product to ensure their product is fully compatible with this release. If you integrate with other Sage products, check with your business partner or Sage to ensure that these components are compatible.
It is highly recommended that you work with a certified partner to install this product update.