Recommended Requirements for Windows Server with multi services

Question

What are the Recommended Requirements for Windows Server 2019 System with AD, DNS, and DHCP server in one device to serve about 250 clients or more?

Is this safe for me to put these services on one device?

And what are the Recommended Requirements for an Additional DC Windows Server 2019 server for backup?

I'm junior in the field so any help or advice would be very helpful and greatly appreciated!

Thanks

Answer 1

Hi,
Welcome to ask here!

There should be at least 2 domain controllers and DNS servers in a single domain.
Since the DNS ad integrated in AD, both the 2 DCs should act as DNS servers.

The general recommendation is to not run any additional roles on your domain controller other than DNS.
So, the DHCP service can be added on the member server.
Or if you don't have so many servers, you can also put it on the DC, but should have failover set up on a second server.
DHCP Best Practices
No specific requirements for the second DC.

For the domain maintenance, you can also refer to the following method to back up DCs:
Back up and restore Active Directory domain controllers

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Best Regards,

Answer 2

Hi,
It is depended on your requirements.
For more details you can refer to:
https://learn.microsoft.com/en-us/windows-server/administration/performance-tuning/role/active-directory-server/capacity-planning-for-active-directory-domain-services