CRM 4.0 FAQ > Upgrade > Can I import customizations from CRM3 to CRM4?
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Currently the only supported path for upgrading your customizations would be to use the upgrade process from a CRM3 to to CRM4
Keep in mind it is possible that you do this on a copy of your production or live CRM 3 install
Simply importing CRM3 customizations into CRM4 will not upgrade them
Last updated on October 2, 2007 by David Yack