dns records disappear after new 2012 dns servers installed

im in the process of migrating my domain controllers to 2012
I have 4 2008 dns servers 2 at head office and 2 at branch
I have installed 2 new 2012 servers at head office and installed dns roles
im going through my servers and pointing them at the new 2012 dns servers
this last few days some dns records of servers seem to be going missing
I had to recreate the record manually
any ideas why this could be happening
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dougdogAsked:
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Aaron TomoskySD-WAN SimplifiedCommented:
Scavenging? Generally if you use that you only set it up on one DC. If DHCP  is doing DNS look at the user account for that and the machine account in the dnsupdateproxy group
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dougdogAuthor Commented:
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dougdogAuthor Commented:
this was the correct solution
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