GC on Exchange 2010

Hi chaps,

We have an exchange 2010 server at a data centre and our AD server is on the other end of a VPN connection at our office.

I know that MS dont support having Exchange 2010 on a domain controller but is there anything we can do to make the Exchange 2010 a bit more resiliant to VPN glitches ? What about making the Exchange 2010 server a GC perhaps, would that work ?

Olly
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stonnewayAsked:
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AkhaterCommented:
exchange on a domain controller is supported but not recommended.

you need in fact to have a Domain controller working as a GC in the site where your exchange server is, however do not promote your server to a DC while you have Exchange installed on it you might break your exchange installation
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stonnewayAuthor Commented:
Is there anything we can do to the current Exchange server? I'm assuming from what you say that making the Exchange server a GC isn't possible.

Another thought is to create a VM based server on the Exchange Server and in it run a basic 2008 install and make that a DC.

Olly
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AkhaterCommented:
A GC should be first a DC to be honest I have never tried to promote/demote a server running exchange 2010 so things MIGHT have changed but I learned from previous exchange versions that doing so will break exchange.

the VM approach is possible (keeping aside potential performance issues) would work
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Wonko_the_SaneCommented:
Nah, you do not want to promote any Exchange server to a domain controller

I agree, depending on your config the VM may work but it's less then ideal. Probably still better than not having a DC/GC on site though. I would just expect major problems when you reboot the server.... Your Exchange server would try to contact the DC which is not running yet (since it runs as a guest), and thus having issues starting up. You may be better off if you make this a Virtual Host and virtualize both DC and Exchange, but I cannot say if if this is feasible in your situation  - depends on hardware, usage, sizes, etc.
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stonnewayAuthor Commented:
Hmm well we are planning on getting an additional, redundant, exchange server at the data centre so perhaps we can make that a VM host and dump the Exchange server in to a VM and make the VM host a DC.
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Wonko_the_SaneCommented:
If you do Hyper-V I think you are better off creatingt two seperate VMs for both Exchange and DC - I really wouldn't recommend mixing those roles. And you won't gain much. You may have to add a little more RAM to your host when doing that, but that's easily worth it.
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