The USCIS has announced that starting October 1, 2017, they will no longer waive the in-person interviews for employment-based green card applications, and for refugees coming to the USA to join family members.
This seems to be a result of the President’s executive order on travel, ordering the agencies to apply “Extreme Vetting” measures when admitting foreign nationals to the USA. It is worth noting that the government is laying plans to expand interview requirements for non-immigrant visas as well, including work visas.
For international faculty and staff currently processing green cards with our office, we will contact you with further information pertinent to your individual case.
For further information, please see:

https://www.uscis.gov/unassigned/uscis-to-expand-in-person-interview-requirements-for-certain-permanent-residency-applicants

http://www.politico.com/story/2017/08/25/trump-administration-green-card-hurdle-242050