Make sure the Solution is compatible to Dynamics 365 (8.2), for this check the Version Compatibility https://docs.microsoft.com/en-us/previous-versions/dynamicscrm-2016/developers-guide/gg328109%28v%3dcrm.8%29#version-compatibility Upgrade the existing CRM 2016 On-Premise Server to CRM 2016 (8.1) for its solution to be compatible with Dynamics 365 Online using cumulative updates. https://support.microsoft.com/en-gb/help/3142345/microsoft-dynamics-365-onpremise-cumulative-updates If upgrading from previous version i.e. prior to CRM 2016, use “Migrate by … Continue reading "Upgrading from Dynamics CRM 2016 On-Premise to Dynamics 365"