Strange DNS reports

I get random messages saying that the DNS for my box has changed, usually several days apart. It either says the IPV4 address is not set (IPV6 OK) and therefore is wrong, or both the IPV4 and IPV6 addresses are set and OK. I have 3 external authoritative servers but for the box domain I am only using 2 because the 3rd is a bit oddball. What I would like to know is how to work out how MIAB is determining what it says. Does it use its own methods to consult the DNS or that of the OS? Could it be a timeout in MIAB?
Thanks for reading

Honestly I have been getting the same since the start of time it seems. I know that NO DNS changes were made. I have completely ignored these messages.