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Fast first logon is a new feature that frees users from waiting while files are copied to the server the first time they log on after a Folder Redirection policy has been applied that redirects the path of a user folder to a network location. It also optimizes network usage on WAN links by synchronizing files as a background task. Prior to Windows 7, after a policy was applied that redirected a user’s folder to a network location, the user had to wait while the contents of the folder were moved to the new location. This process could take a considerable amount of time if there was a large amount of data to move and the network was slow. On Windows 7, as long as Offline Files is enabled (it is on by default), the user must wait only for Windows to move the files into the local Offline Files cache. After the files are moved, the user logs on and is free to perform other tasks while Windows synchronizes the locally cached data over the network as a background task.

Usually Offline support provides remote and branch office users with faster access to files that are located in a network folder across a slow network connection. Windows 7 enhances this feature by including Background Sync, a feature that synchronizes Offline Files in the background, ensuring that the server is frequently updated with the latest changes. When a client computer’s network connection to a server is slow (as configured by the administrator), Offline Files automatically transitions the client computer into an “Offline (slow connection)” mode. The user then works from the local Offline Files cache. On Windows 7, Background Sync runs at regular intervals as a background task to automatically synchronize and reconcile changes between the client computer and the server. IT administrators can configure synchronization intervals and block out times. With this feature, users no longer must worry about manually synchronizing their data with the server when working offline.

The Exclusion List feature reduces synchronization overhead and disk space usage on the server, and speeds up backup and restore operations, by excluding files of certain types from replication across all Folder Redirection clients. Prior to Windows 7, all files in an Offline Files folder were replicated to the server. This often meant that a users’ personal files or large files not relevant to the enterprise were replicated to one or more servers, thereby consuming disk space and slowing backup and restore times. On Windows 7, administrators can use the Offline Files Exclusion List feature to prevent files of certain types (for example, MP3 files) from being synchronized. The list of file types is configured by the IT administrator by using Group Policy.

Transparent caching optimizes bandwidth consumption on WAN links and provides near local read response times for mobile users and branch office workers that are accessing network files and folders that are not explicitly made available offline. Prior to Windows 7, to open a file across a slow network, client computers always retrieved the file from the server, even if the client computer had recently read the file. With Windows 7 transparent caching, the first time a user opens a file in a shared folder, Windows 7 reads the file from the server and then stores it in the Offline Files cache on the local hard disk drive. The subsequent times that a user opens the same file, Windows 7 retrieves the cached file from the hard disk drive instead of reading it from the server. To provide data integrity, Windows 7 always contacts the server to ensure that the cached copy is up to date. The cache is never accessed if the server is unavailable, and updates to the file are always written directly to the server.

Transparent caching is not enabled by default. IT administrators can use a Group Policy setting to enable transparent caching, improve the efficiency of the cache, and configure the amount of hard disk drive space that the cache uses.

This feature is turned off by default on Windows Server operating systems. To enable Offline Files on server operating systems, you need to first install and enable the Desktop Experience feature by using Server Manager. After installing Desktop Experience, on the server, click Start, and in the Search box, type Sync Center. In the Sync Center dialog box, click Manage offline files. On the Offline Files General tab, click Enable offline files, and then click OK.

Yes, Offline Files is available in both 32-bit and 64-bit versions.