Hello Kumar,

Go to the "Sales" -> "Sales" -> "Customers", Open Form view for any customer and Click on "More" at the top of the form view.

You will have "Partner Review" Option there. (Right now it will show you warning.)

Now we go through the proper channel.

You need to create Template for Google Drive.

Go to "Settings" -> "Google Drive" -> "Templates". You will see the templates here. The menu you got in the Customer Form is due to this template. You need to configure template over here.

Now Most Importent thing :

You need to setup the drive account as follow.

Go to "Settings" -> "Configuration" -> "General Settings" and by clicking on "Generate Google Authorization Code".

Regards,

Hardikgiri Goswami