Finding a product key for Microsoft Visio Premium 2010 depends on how you originally acquired the software. Since official support for this version ended on October 13, 2020
: By default, many volume license versions of Visio 2010 install as the Premium edition. If you are only licensed for Standard or Professional, you must manually change the key to downgrade to the correct version. Where to Find Your Product Key microsoft visio premium 2010 product key
: Advanced templates for BPMN and subprocess management. Understanding Product Keys Finding a product key for Microsoft Visio Premium