Requested transfer from Warsaw to Almaty two days ago. Fastest correspondence chain since I've been in the process - only took a few hours.
The answer was generally polite but in BOLD type it was denied:
"Greetings,
Thank you for contacting the Consular Section of the U.S. Mission in Kazakhstan.
In response to significant challenges related to staff shortages and huge backlog of immigrant visa applications, the U.S. Mission in Kazakhstan is limited in its resources to process visa services. We provide visa services on a limited appointment basis as resources and local conditions allow. Therefore, given current space, capacity constraints and Consular section’s limited resources and huge backlog we are unable to accept your case transfer request."