This video looks at how to add a child domain to an existing domain in Active Directory. Child domains can access resources from the parent and also from any other domain in the forest. This video will look at adding the east domain to the existing domain. Demonstration at 04:35 Things to consider before adding a child domain The more domains that you have in your forest, the harder it will be to administer your network. When possible, you should attempt to reduce the number of domains in your forest. Sometimes due to company needs or security reasons, extra domains may be created. It should be remembered that in Windows Server 2008 there have been a number of improvements and features which in previous versions of Windows would have required additional domains. These are: 1) Active Directory could previously only have one password policy per domain. If your domain functional level is Windows Server 2008 or higher, you can support multiple password policies for the same doma! in. 2) With Windows NT the database was limited to 40 MB, which was around 40000 objects. Because of this multiple domains may have been required, whereas Active Directory now only requires one. New domains may also be created due to different business unit requirements. In a lot of cases you can separate departments and even companies using organization units inside Active Directory; however, dealing with things like different company budgets is not as simple. If the companies have different IT
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