Robert12 says,

Prabhat Nigam ROCKS! He’s truly an Exchange GURU and not just another Exchange techie! His experience and knowledge were impressive and it saved us a lot of time. He was very methodical – he has his own exhaustive check-list of everything you need to know about before making a change. It saved our butts! He is very professional and very personable - we got to know him personally and to truly trust him unequivocally. We strongly recommend him. You get what you pay for.

for Migrate Exchange 2013 to Exchange 2016 on Sep 19, 2016