Hi,
> Have users start printing via IP to local printer
> Remove Print Services or disable print share (need to remove?)
If the DC is also a print server, you may configure print on other local server and modify user print settings.
I think it’s no need to remove print service in the DC, most of time we will reinstall OS when use retired server for other purpose.
> Remove DHCP role
DHCP is not a domain-aware service, so after you enable DHCP in switch, you can just disable DHCP service on the server.
> Do you think any specific task needed for users to be pointed at switch?
If DHCP is configured in switch, no special client side configuration.
> Remove Global Catalog
No need to do it, it is part of Domain controller demote process.
> Remove WDS role (need to remove?)
Do you mean Windows Deployment Service? Same with DHCP service, no need to do it in the decommission process.
After demote the domain controller, you may reinstall OS for the server.
For more information please refer to following MS articles:
Demote a domain controller
http://technet.microsoft.com/en-us/library/cc740017(v=WS.10).aspx
Removing a Domain Controller from a Domain
http://technet.microsoft.com/en-us/library/cc771844(v=WS.10).aspx
Forcing the Removal of a Domain Controller
http://technet.microsoft.com/en-us/library/cc731871(v=WS.10).aspx
Lawrence
TechNet Community Support
