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Windows Server



    

Windows Fast Logon Optimization Feature    

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Windows Fast Logon Optimization Feature



Apr
25

Windows Fast Logon Optimization Feature

http://technet.microsoft.com/en-us/library/cc780527.aspx

Fast Logon Optimization

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

Fast Logon Optimization

The Fast Logon Optimization feature is set by default for both domain and workgroup members. This results in the asynchronous application of policy when the computer starts up and when the user logs on. This application of policy is similar to a background refresh. It can reduce the length of time it takes for the logon dialog box to appear and the length of time it takes for the desktop to become available to the user.

You can change the default setting by using the Group Policy MMC snap-in. This feature is enabled by default, but you can disable it by using the following policy: Administrative Templates\System\Logon\Always wait for the network at computer startup and logon.

Policies are processed according to the criteria listed in the following table.

 

Default policy process for clients

At startup

At logon

At policy refresh

Windows 2000

Sync

Sync

Async

Windows Server 2003 family

Sync

Sync

Async

Windows XP Professional and Windows XP 64-bit Edition (Itanium)

Async

Async

Async

 

Notes

  • Logon Optimization will not be enabled and policies will be processed synchronously when a user is logging on for the first time, the user has a roaming profile, the user has a HomeDir, and the user has a logon script specified in the User object. Folder Redirection and Group Policy Software Installation require a synchronous application of policy. Under these conditions, computer startup can still be asynchronous. However, since logon is synchronous, logon does not exhibit optimization. 
  • Client computers running Windows XP Professional, Windows XP 64-bit Edition (Itanium), and Windows Server 2003 operating systems support Fast Logon Optimization in any domain environment. 

 

http://technet.microsoft.com/en-us/library/cc780527.aspx

 

http://support.microsoft.com/kb/305293

Description of the Windows Fast Logon Optimization feature

 

SUMMARY

This article describes the Windows Fast Logon Optimization feature.

 

MORE INFORMATION

By default in Windows 8, Windows 7, Windows Vista, and Windows XP, the Fast Logon Optimization feature is set for domain and workgroup members. Policy settings apply asynchronously when the computer starts and when the user signs in. As a result, Windows 8, Windows 7, Windows Vista, and Windows XP do not wait for the network to be fully initialized at startup and sign-in. Existing users are logged on by using cached credentials. This results in shorter logon times. Group Policy is applied in the background after the network becomes available. Be aware that, because this is a background refresh, extensions such as Software Installation and Folder Redirection take two logons to apply changes. Additionally, changes that are made to the user object, such as adding a roaming profile path, root directory, or user object logon script, may take two logons to be detected.

If you turn off this feature, Windows waits for the network to be fully initialized before users are logged on. This results in the synchronous application of policies when the computer starts and when the user logs on. This application of policies resembles a background refresh process and can reduce the time that is required for the Logon dialog box to display and the time that is required for the shell to be available to the user. An administrator can change the default by using the Group Policy MMC snap-in.

Fast Logon Optimization is always off during logon when a user first logs on to a computer.

You should be aware that, under the previous conditions, computer startup can still be asynchronous. However, because logon is synchronous under these conditions, logon does not exhibit optimization. 

When your folder redirection policy is not completely applied at first logon, you can find the following warning in the event log:

Event Type: Warning
Event Source: Folder Redirection
Event Category: None
Event ID: 301
Description: Folder redirection policy application has been delayed until the next logon because the group policy logon optimization is in effect.

Folder redirection and software installation policies

Be aware that when logon optimization is turned on, a user may have to log on to a computer two times before folder redirection policies and software installation policies are applied. This is because applying these kinds of policies requires the synchronous policy application. During a policy refresh (which is asynchronous), the system sets a flag that indicates that applying folder redirection or a software installation policy is required. The flag forces synchronous application of the policy at the user's next logon.

BE aware that Windows clients support Fast Logon Optimization in any domain environment. To turn off Fast Logon Optimization, you can use the following policy setting:

Computer Configuration\Administrative Templates\System\Logon\ Always wait for the network at computer startup and logon

When this policy is enabled, a Windows XP client behaves in the same manner as a Windows 2000 client at both system startup and at user logon. 

Note
This also applies to systems that are running Windows 7 or Windows 8. However, in those systems, the event ID changes to 510:


Event Log: Application Log
Event Type: Error
Event Source: Microsoft-Windows-Folder Redirection
Event ID: 510
Description: Folder redirection policy application has been delayed until the next logon because the group policy logon optimization is in effect.


For more information about the effect of Fast Logon Optimization and Fast Startup on Group Policy settings, go to the following Microsoft website:

Understand the Effect of Fast Logon Optimization and Fast Startup on Group Policy

REFERENCES

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

969006 The Home Folder may be mapping incorrectly when logging on to a Windows XP-based computer

304970 Scripts may not run before Windows Explorer starts even though the "Run Logon Scripts Synchronously" setting is enabled

831998 Mapped network drive shows no drive letter or will not allow you to create new long-named files or folders

 

Article ID: 305293

Applies to

·         Microsoft Windows XP Professional

·         Windows 7 Professional

·         Windows 8 Pro

 

Keywords:

kbgrppolicyinfo kbinfo kbnetwork KB305293

 

 

 

http://support.microsoft.com/kb/305293

 



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