SBS2008 environment adding 2016 Server as a DC with different domain, is it possible?

Allot of information around adding an additional DC in an SBS environment. I believe it references the additional DC being in the same domain which causes problems with FSMO. My question is it possible to add a 2016 Server as a DC with a separate (it's own) domain. Meaning it would be a two domain environment rather than SBS with a redundant DC.
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WORKS2011Managed IT Services, Cyber Security, BackupAsked:
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Lee W, MVPTechnology and Business Process AdvisorCommented:
You can add a 2016 DC to your SBS domain with NO PROBLEMS.  If you try to move the FSMO roles off the SBS server, THEN you have problems.  But simply adding the DC is fine and should not cause any issues.

Otherwise, you can add other domains to the network (they can't be configured to speak easily to the SBS domain since SBS domains cannot have trusts) but they can co-exist.  The biggest problem is DNS. Active Directory domains rely heavily on DNS.  You would need to setup DNS on one domain's PCs separately (statically) while the others could use DHCP.  (Note: SBS DHCP will shut down if another DHCP is activated on the network).

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WORKS2011Managed IT Services, Cyber Security, BackupAuthor Commented:
Thank you Lee. I have all the data moved off the SBS migrated over to the new 2016 server, I'll either physically remove the SBS or demote it. I'd like to keep it on the network for a week or so in case I missed anything. With this in mind demoting a SBS is straight forward, correct? Then add it back to the new domain.
Lee W, MVPTechnology and Business Process AdvisorCommented:
You cannot demote SBS and continue to use it.  It MUST be a DC and hold the FSMO master roles.  If you don't want to use it, uninstall exchange, Transfer the FSMO masters, and demote it.  Then remove it from the network (if you attempt to keep it on the network, it MAY seem to work for a few days to a few weeks, but at most, 3 weeks later, it will start shutting itself down.

If you're not familiar with the process of adding/removing DCs from a domain, I strongly recommend you partner with someone who is.  I've given you basic steps as a reminder for what you should already know... BUT to properly demote and ensure all systems continue to function, you need to check the health of AD and monitor things - someone who knows this process should be aware of this and able to do so successfully or at least with minimal disruption to you/your network.
WORKS2011Managed IT Services, Cyber Security, BackupAuthor Commented:
Thank you Lee, migrated the data including exchange and pulled the SBS from the network, didn't worry about making any other changes. Installed the new server, configured as DC, networks up and running.
PberSolutions ArchitectCommented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Accept: Lee W MVP (https:#a42364444)

If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

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