Strange issue here.
I have a client that is having issues send out email from an Exchange Server. During troubleshooting i performed a NSlookup of the domain the client is trying to send to.
From the Domain Controller / DNS Server, if I run:
It will fail, however if i type it again several times, it eventually provides me the correct information.
They have several domain controllers / DNS servers in the office and they appear to be all having the issue. They were using DNS forwards that point to their ISP but during troubleshooting I removed them and now using Root Hints.
These DNS servers are also virtual running VMware on ESXI. Are there any known issues on vmware that could cause this issue?