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Server 2012r2 dc & Server 2003 standard dc co-existing temporarily

I am upgrading an old server 2003 standard, it is a dc, file/print server, has just 10 users running terminal services. Email is offsite.
I have setup a new 2012R2 server running under hyper-v. I would like to have it coexist if possible on same 192.168.0 network as 2003 server for a period of no more than 60 days, just to give me time to copy accross all users data etc to new server.  New server is running RDS. I need the 2003 server to run as it is for one application until the cut over is completed, User will access 2012r2 server for everything else (file,print ect) until this date. I don't need to migrate users/printers/apps/permissions etc.
Thanks in advance.
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scottics
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scottics
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Cliff GaliherCommented:
2012 R2 DCs can coexist with 2003 DCs but it is never a good idea to run ADDS and RDS on the same server. You will have issues.
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scotticsAuthor Commented:
When i setup Server 2012R2, i tried to setup RDS first but the wizard said it required AD to be installed first, seems to be working fine with both. I know it was an issue with 2008.
Do i need to do anything for 2012 R2 DC to coexist with 2003 DC or just install the new new server into existing network.
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Cliff GaliherCommented:
RDS needs a reachable DC with the appropriate schema, but it does not need ADDS *on* the RDS server. And because DCs get more stringent security templates, you WILL have problems. It may functionally install, but you'll bang your head on random odd issues and users will be frustrated. Trust me, DON'T DO IT. 2012 standard offers virtualization rights that lets you separate roles. Take advantage of that!

As far as whether anything needs to be done... it depends. A 2003 DC can exist on a network at a 2000 mixed functional level. 2012 R2 can't. But run the ADDS wizard and it will tell you if the network meets the requirements. If not, it'll tell you why.
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scotticsAuthor Commented:
Cliff,
When you say 2012 standard offers virtualization rights that lets you separate roles. Is this the same with on 2012 Standard R2 (i presume so).
So should i configure 2 seperate Hyper-v Guests, one as Domain controller and a second as RDS server/file server/print server and join it to domain.
Seems overkill for 10 users, but if that's how it is then i will go with it.
Also means i will need to change my backup strategy which was Shadowprotect VM to backup single virtual server. I may need seond licence to backup the dc.
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Cliff GaliherCommented:
The virtualization rights are the same for 2012 and 2012 R2. And yes, two guests for that scenario.
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scotticsAuthor Commented:
Thanks, Have now setup 2 x Virtual Servers, DC and RDS.
Thanks
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