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domain, all of the data stored in the user profile on the network share is copied to the local computer. This process can result in a slow logon, especially when the size of the user profile grows beyond 20 MB. When a user logs off the system, the same profile must be copied back to the network share; this process results in a slow logoff. n Lack of real-time data synchronization With roaming user profiles, changes a user makes to his or her documents and settings are copied back to the central network share only when the user logs off. This lack of real-time data synchronization can complicate matters for users who frequently switch systems while performing their jobs. n Network problems can disperse profile data If a user configured with a roaming user profile experiences network problems during logon, a new profile can automatically be created for that user on the local system. Any work saved during this logon session becomes unavailable to the user during future sessions if he or she is once again able to connect to the network share.
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Lesson 1: Resolving User Profile Compatibility Issues
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Lack of roaming user profile automation Although you can configure roaming user pro-
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files on many existing accounts simultaneously, there is no method built into Windows that allows you to configure newly created users with a roaming user profile by default. This lack of automation results in increased administrative overhead and in increased opportunity for misconfiguration. To address the limitations of roaming user profiles, you can use a feature called Folder Redirection either in place of roaming user profiles or in addition to them.
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Understanding Windows Vista Folder Redirection
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Folder Redirection allows you to change the target location of user profile folders in a way that is transparent to the user. For example, if an administrator has redirected your C:\Users\Documents folder to a central network share, you will still see the Documents folder in the same location on your local computer. Whenever you open the Documents folder, however, the window reveals contents stored at the redirected location on the central network share. You can configure and enforce Folder Redirection for domain users through Group Policy. The folders that you can redirect through Group Policy are shown in Figure 3-3.
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Figure 3-3
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Folder Redirection in Windows Vista
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When configured, Folder Redirection offers a number of important advantages over traditional roaming user profiles:
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3
Troubleshooting Deployment Issues
Compatibility between Windows Vista and earlier versions of Windows I n W i n d o w s Vista, you can configure Folder Redirection in such a way that most of the important elements of a user profile are accessible across all recent Windows versions. For example, you can configure your Application Data, Desktop, Start Menu, and Documents/ My Documents folders to be redirected to a specific set of folders on a network server regardless of whether you log on to a Windows 2000, XP, or Vista computer. Folder Redirection is therefore an essential method of providing data consistency for users who roam among Windows Vista computers and Windows 2000, XP, or Server 2003 computers. For the 70-622 exam, you need to know that Folder Redirection allows you to provide consistency between Windows Vista and Windows XP roaming user prof iles.
Exam Tip
Faster logons When you redirect folders such as the Documents folder, the redirected data is essentially separated from the user profile. This redirected data is never downloaded to the local computer at logon, even when you also configure roaming user profiles. Instead, the data is accessed only as needed much as it would be accessed through a desktop shortcut to a network share. The desktop shortcut is part of the user profile, but the data behind the shortcut is not.
The same factor that allows for faster logons also allows for equally fast logoffs. Real-time data synchronization By default, configuring Folder Redirection enables a feature called Offline Files. Offline Files allows a copy of the files contained in redirected folders to be stored locally, and when changes are made to the local copies, the changes are then automatically synchronized with the original source files. When you turn off Offline Files, the user connecting to the redirected data connects directly to the original source files and any edits the user makes to this data are made to the source data. In both configurations, Folder Redirection, when properly configured, allows users to witness any data changes they make to redirected data instantly on other computers they simultaneously log on to. Unlike with roaming user profiles, the changes made by users are not copied back to the source only when the user logs off. n Network problems do not disperse data If network problems prevent a user from connecting to a redirected folder, the user can access the local copies of the data made available from Offline Files. This data is then automatically synchronized when network connectivity is reestablished. If you turn off the Offline Files feature or if the data has never been synchronized, the user simply receives an error message and fails to connect to the source data. In either case, a faulty network connection does not lead to data being dispersed among separate user profiles for the redirected folders in question.
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