I have recently been researching how to clone Citrix servers, and some guides from Citrix imply a new SID is only required for Window 2000 Servers. Although in the past I have always applied new SIDs with NewSID (unless I Sysprepped something), I wondered if anyone has any more details of where and when a new SID is really necessary.
For example I'd like ideas/fact/opinions on whether new SIDs are needed if Servers will be joined to a domain (like the above mentioned Citrix Servers). I believe duplicate SIDs can be an issue in a Workgroup, and I also recall that even using NewSID you can experience issues with Sharepoint 2007.
Any info is greatly appreciated.