Active directory to open directory shift, dns and dhcp??

We are moving away from our windows server to an apple server since the windows server is a decade old and we only have 4 windows machines vs the 26 apple computers and several linux machines. We are a large church but i am part time so I'm trying to do this in a staged shift, we have user shares already moved over to onedrive with out office 365 subscription and global shares will be handled via a synology NAS. So in doing this migration i want to leave some machines on the active directory while i move things over to the open directory. I want to immediately however change the DNS server and DHCP server to the mac server. Will the Active directory or its machine freak out when i do this since it currently handles both? i will of course go in and remove those server roles form the windows server. Will i need to do anything to the client machines left on the AD in the mean time? i know i will have to change the dns server address on the static clients(printers).
jessebruffettAsked:
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Will SzymkowskiSenior Solution ArchitectCommented:
Transferring the DHCP role should be no issues. Just make sure that you un-authorize the DHCP server that is in your active directory domain.

As for DNS, active directory relies on DNS to function. If DNS is not present then AD will not work properly. You can however use a different DNS server than Windows DNS (not recommended, but it can be done). You will need to configure your AD to use the new DNS server.

Take a look at the link below which outlines how to accomplish this.

http://www.serverlab.ca/tutorials/linux/network-services/using-linux-bind-dns-servers-for-active-directory-domains/

Will.
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