At the beginning of the chapter, we mentioned that there are three possible options available for upgrading from SharePoint Portal Server 2003 to Office SharePoint Server 2007. Here we discuss these options in detail and define the steps that are involved in each of these processes.
As mentioned earlier, the in-place upgrade is most suitable for single-server or small deployments of SharePoint Portal Server 2003. In an in-place upgrade, you will be installing Office SharePoint Server 2007 on your existing environment. The previous version is overwritten with the new version, and the content databases are changed. Hence, this is not a reversible process—you cannot roll back to the previous version. When you run the in-place upgrade, the process upgrades your entire installation in a preset sequence. The following list shows the steps that need to be taken to implement an in-place upgrade. (For this in-place upgrade, I have an existing SharePoint Portal Server 2003 environment set up. It is a basic out-of-the-box setup with a couple of Windows SharePoint Services v2 sites and no customizations.)
This will bring up the Product Key dialog box (Figure 24-5). Enter the proper information to be able to move forward.
Figure 24-5. Office SharePoint Server 2007 Product Key installation page
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