Could ISP DNS such as googles be part of the problem?  Just curious because I did not notice the changes until a month or two after changing my ISP connection DNS to Googles.  previously I had used the ISP given DNS.  If we are looking a common settings... I also deliver DHCP to the clients using the meraki MX... along with AD DNS I allow 8.8.8.8 and of course 8.8.8.8 is also part of my servers set DNS.  Curious to see what kind of feedback I get if people are willing to put for the effort.   ... View more