Forgive the length, but I want to provide a detailed description of the problems I'm running into what I've checked so far:
I purchased Solarwinds DameWare to help with supporting PCs in-house. I started running into problems where it would not connect to some computers. Other computers worked fine. One of the error messages on DW said something along the lines of "The computer you're trying to connect to is actually a different computer. Do you want to continue?" So I started troubleshooting and running into some strange DNS weirdness.
Starting with the two computers involved with the error above, I pinged both by name from my PC and they both returned the same IP address. When I went to those PCs, one of them had that IP and the other had a different IP. Digging further, I started running into a few more computers that when pinged by name returned incorrect/duplicate IPs.
Some research indicated I might not have DNS scavenging turned on. Odd thing is, everything worked fine before installing DameWare. I was using UltraVNC for report desktop support, and now that won't connect to these problem PCs either. So I started checking my DNS settings on the Domain Controller. (I only have one DC and it is the only thing managing DNS that I am aware of.)
Logging into the Domain Controller > Server Manager > Tools > DNS
When I look in the tree under my server > Forward Lookup Zones > my domain, I'm seeing a list that includes records that are months or years out of date! And multiple entries that have the same IP!
I tried checking the settings: R-Click my domain in the tree > Properties > General tab > Aging button > checking the box and setting an interval in both fields (1 hour). But even after that time, there was no change to the DNS list.
Now, when I try pinging some addresses from my PC, I'm getting even stranger results: Whenever I try to ping anything that has a duplicate IP in that list, I get "Reply from 10.16.68.18: Destination host unreachable", and the 18 address is the IP currently assigned to my PC.
I must be missing something simple.
I also don't understand why I was never having problems until I started using DameWare (local install only. I'm not using the DameWare server.)
Any assistance would be greatly appreciated!