Make sure the Solution is compatible to Dynamics 365 (8.2), for this check the 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…
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Upgrading from Dynamics CRM 2016 On-Premise to Dynamics 365 – Nishant Rana’s Weblog
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