As deanmoriarty mentioned, this "request for evidence" is issued by USCIS when we (employer) apply for a visa or an extension. In the last 1 year, RFE was more or less certain if one is working for an Indian employer. I had never even heard of that term before 2017.
RFEs are usually issued by USCIS (government) after sending some request in. In this case, likely the parent poster employer filed for an H1B extension, and got the RFE as a reply instead of an extension approval.
https://techcrunch.com/2018/07/25/h-1b-visa-rfe-trump-admini...