@abeydoun so I am clear on your question, you want to see business expenses that employees made from a certain vendor, correct?
Do you have Cognos report building experience? This will be very important for me to know so I can better assist you. In Cognos you can easily build a report to show what you are looking for. Well, I say easily because if you have used Cognos previously, it would be easy. :-)
I'll await your reply then go from there.
@abeydoun I'll be completely honest with you. Without any Cognos experience, it will be difficult for me to explain how to get what you are looking for. Cognos isn't super intuitive. However, we do have training resources on using Cognos. Although the resources do not specifically show you how to build the Vendor report, it does give you a very good idea of how the tool works.
You can find these resources here: https://www.concurtraining.com/toolkit/en/data-insights/analysis
If you are interested in attending a free class on using Cognos, you will see options for registering for our class when you go to the second link.
Let me know if you have any questions about what I've posted.