An error occurred while validating the server
That is the problem I am having, adding the IP or FQDN as an allowed server. I am trying to add the record in the Name Servers tab of DNS and it is something like this...ns1.that resolves to 192.168.1.10 and is a standard IP in our scheme.Microsoft is conducting an online survey to understand your opinion of the Technet Web site.If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.
I am working closely with the admins responsible for these devices and can get tests performed as needed.) We have run into an issue where we cannot add conditional forwarders that point to BIND nameservers under Windows Server 2012.It sounds like you have 3 Wide IPs set up on the GTM, which will also answer requests for records in the zone you wish to transfer.Have you configured the zone in MS DNS to allow transfers to the self-IP address of the GTM BIG-IP?(as opposed to the screenshot above) The remaining problem is unrelated to this issue and I'm going to close the Q&A.Please convert your comment about the confusing validation behavior to an answer so that I can give you credit.
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I can't really pin point any changes that would have affected this short of windows updates.