Hi Rejith,
We can't directly export a managed solution to an unmanaged solution in Dynamics 365. But the following steps may help you convert a managed solution to an unmanaged solution:
Steps to Change Managed Solution to Unmanaged Solution:
Export the Managed Solution as Unmanaged: Go to Settings > Solutions.
Find and click on the Managed Solution you would like to export.
Click on Export and select Unmanaged for the export option. Download the exported solution on your computer. Import the Unmanaged Solution Back: Back to Solutions in Dynamics 365 Import and Import an Unmanaged Solution Click Import and then import the Unmanaged Solution you have just exported. Proceed to import the solution Delete the Managed Solution (optional) After ensuring the unmanaged solution is fine, you may now delete the Managed Solution, if required.
If you still have a problem, let us know in the comments. We are happy to help you.
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