Use the Get-CrmProductKey command in the Dynamics CRM PowerShell module to display the active key.
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If the software is already installed but you have lost the documentation, you can retrieve the key through these methods: dynamics crm 2016 product key
If purchased through an Enterprise or Volume License agreement, log in to the Volume Licensing Service Center to view your products and corresponding keys. Use the Get-CrmProductKey command in the Dynamics CRM
For volume licensed versions, the installer is often "pre-keyed." You can find the key by extracting the installer files and checking the \server\amd64\license.txt file. Upgrading from Trial to Full Version dynamics crm 2016 product key