I am exporting a VF page as Excel document. But i cant seem to get the logo put to display in the exported excel sheet. All i get for the image is red X
I did see some post to upload the image as document and use the document url to display the image.
In one of the post, they have asked to use the following url https://mydomain.my.salesforce.com/servlet/servlet.ImageServer?id=015a00000030EqL&oid=00D30000000X7qS&lastMod=1392744621000
What does the id and oid represent ?