KB44915 - Sharepoint 2016 and above file checkout via MS Excel throws a warning "The file has been moved. We recommend saving it now to finish moving it." in Office 365.

This article describes an issue where users are unable to edit workbook in Microsoft Excel with using Core/Web/Rewriter access.

When users click on "Edit Workbook" while working with Sharepoint 2016 and above perform file checkout via MS Excel, they see the warning "The file has been moved. We recommend saving it now to finish moving it."

This is a limitation with Ivanti Pulse Connect Secure.

The hash value sent by the backend is based on the original path which gets validated against the local path used to open excel on the user machine. In the direct scenario, the path matches and we don't see an issue. In rewritten case, both hash values will not match as due to rewriting the hash will be different on the endpoint side & hence there is no way for us to make them match as it breaks rewriter functionality altogether and the request goes direct making the file open fail. 

We are good to conclude this as a Pulse limitation due to changes made by Microsoft and there is no way that we can handle/fix this limitation.