MS Powerpoint(.PPTX) Document Custom properties not visible if file downloaded from google drive

Question

I am creating VSTO MS PowerPoint plug-in in .net c#.

Programmatically I add some custom document properties to the PPTX document and using API I upload it on Google Drive. So when I download the same uploaded file from Google drive then Document custom properties are missing.

I observe that Powerpoint is opening the file in Protected view and I already try with following manually in powerpoint,

1. Go to File-> Option->Trust settings and off the protected view.
2. Enable All macros.

but when I tried to regenerate the case then also it's not showing the Custom properties of the document if I download the file from Google Drive

Any kind of help appreciated. what should I need to do on this so I can get the custom properties after I download the file from Google drive