After Mounting the database on SharePoint 2016, below is an error I'm getting:

Could not load file or assembly 'VDR_Mail_Event_Solution, Version=, Culture=neutral, PublicKeyToken=8f7265d6d3991bc8' or one of its dependencies. The system cannot find the file specified.

closed as unclear what you're asking by Gaurravs, Ganesh Sanap, Mohamed El-Qassas MVP Oct 1 at 23:57

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.


Did you have a custom solution/feature related to "VDR_Mail_Event_Solution" on you SharePoint 2013 farm?

If you have deployed custom solutions/features on your SharePoint 2013 farm, to make sure them work on your SharePoint 2016, you need to re-deploy them on your SharePoint 2016 before you mount database on SharePoint 2016 farm.

Or, if you don't continue using these solutions/features, you can remove them on your SharePoint 2013 firstly, then backup your database and mount it on your SharePoint 2016.

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