We have several different locations and each location has a server and it's own domain. They're all connected via a WAN. Each location's DNS is set as secondary at the central location. Sometimes I can ping other systems by name and sometimes not. It seems that over time the issue has gotten worse. I can not ping systems by name at all (if it's off site from where I am) UNLESS I run ipconfig /renew a couple times. I've looked at some DNS settings but I don't know what to change.