Samba4 internal DNS problems - fresh start

[Mike Howard]

I'm currently having problems with Samba4's internal DNS. Originally, it 
was working, in that client's dhcp addresses were being updated. Then it 
seemed to stop.
I did try managing it through Windows tools on an XP box but mostly 
things don't work that way ( ...... not supported on this .......) and 
maybe that screwed things so I've tried samba-tool which seems to work 
great but I still don't know why updates aren't happening.

'samba_dnsupdate --verbose --all-names' just provides lots of stanzas 
beginning with these two lines;

; TSIG error with server: tsig verify failure
Failed nsupdate: 2

Is there a easy way to delete all the internal dns stuff and reinstall 
it afresh? Obviously, I don't want to lose my domain data, users, 
computers, groups, gpo's etc?
I did try going back to the bind9 backend, which worked, but I would 
like to get the internal backend working and suspect it's my 
installation at fault.

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