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As a DST, you will have to troubleshoot local and domain logon issues. When users cannot log on to their computers or log on to their domains, they cannot work. Network resources cannot be accessed until a user is authenticated, either by their local computer or by a domain controller. You should be able to troubleshoot the possible reasons why the logon is not working, and you should also be able to troubleshoot any startup problems that a user might be experiencing. To answer the questions in this objective, you should know how to reply to questions posed by a user relating to system startup issues. You should also know how to trou bleshoot logon issues, both locally and over a domain.

Mailbox health is a general term that encompasses a lot of factors. As far as your users are concerned, the system is healthy if they can connect easily and rapidly to their mailboxes and send and receive e-mail messages with no perceptible delays or problems. This in turn depends largely on connectivity between the user s client computers and your organization s Exchange Server 2007 servers. You can use the Performance console tools System Monitor and Performance Logs and Alerts to monitor connectivity, recognize potential problems, and set alerts to trigger on threshold counter values. You can use PowerShell commands and Exchange Management Console to configure protocol logging for SMTP traffic on Send and Receive connectors and monitor the results. However, one of the first places you need to look for potential problems is in the mailbox statistics. You can obtain statistics for a single mailbox, groups of mailboxes, all the mailboxes in a database, all the mailboxes in a storage group, all the mailboxes on a server, and all the mailboxes in an Exchange organization. Obtaining mailbox statistics is straightforward; interpreting them is rather more difficult. This lesson looks at using PowerShell commands to obtain and filter mailbox statistics and to check protocol connectivity. It also looks at how to use Perfmon counters to monitor client connectivity.

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Some built-in services already take advantage of this functionality to make sure the system boots faster and service activity doesn t interfere with the user s logon. Among them, you ll find Windows Update, Windows Media Player Network Sharing, Windows Defender, and other services. Unfortunately, delayed auto-start services are not a panacea. They improve startup times and remove interference from a highly sensitive performance path, but as soon as the service is started it continues running unless someone explicitly stops it. Even if the service has absolutely nothing to do (for example, if it relies on Internet connectivity but you re working on a laptop in the middle of the desert), it still consumes significant system resources. As a service developer, you might be tempted to argue that the 5 MB of memory consumed by your service is not going to seriously affect the user s experience. However, the 50 other services on that user s system would beg to differ. If we want to provide our users with a highperformance experience on Windows 7, it takes more than delayed auto-start services.

Windows XP comes with Console Registry Tool for Windows (Reg.exe). This tool is nothing short of marvelous. You use it to edit the registry from the MS DOS command prompt. You can do with Reg.exe just about anything you can do with Regedit, and more. The best part of Reg.exe is that you can use it to write simple scripts in the form of batch files that change the registry. And unlike in earlier versions of Windows, you don't have to install Reg.exe. It's installed by default and combines the numerous registry tools that came with the resource kits for earlier versions of Windows. This tool is so cool I can just start with an example. Listing 9 6 is a simple batch file that installs Microsoft Office XP the first time the batch file runs (think logon script). After installing Office XP, the batch file calls Reg.exe to add the REG_DWORD value Flag to HKCU \Software\Example. The batch file checks for this value's presence each time the file runs and skips the installation if it exists. Thus, the batch file installs the application only one time. This is a method you can use to deploy software through users' logon scripts. Instead of checking for a value that you add, as Listing 9 6 does, you can check for a value that the application stores in the registry. For example, the second line in the batch file could just as easily been Reg QUERY HKCU\Software\Microsoft\Office\10.0 >nul, which checks to see if Office XP is installed for the user. Listing 9 6: Login.bat

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