eM Client set as default email app in Windows 10 not working

Even though eM Client is set as my default email app in Windows 10, ONLY Microsoft Mail opens when I try to send a file as an email. Microsoft says this is em Client’s problem. Please advise.

You may need to install .NET 3.5 to get this to work.

Yes, for all those having MAPI issues when “Sharing” a document from MS Word, installing .NET3.5 fixed it for me. Wish I come across this response 3 days ago.