SYMPTOMS

During the installation of the 2007 Microsoft Office servers Service Pack 2 that…

During the installation of the 2007 Microsoft Office servers Service Pack 2 that was available between April 28, 2009 and July 29, 2009, a product expiration date is activated incorrectly. This means that any of the products that are listed in the “Applies to” section will expire 180 days after Service Pack 2 is deployed, as if it were a trial installation. The activation of the expiration date will not affect the regular function of these products until the expiration date passes, 180 days after Service Pack 2 is deployed. If the product expires, it will not affect data, configuration, or application code. However, it will make the Office Server product inaccessible for end-users.
Office SharePoint Server Trial with Enterprise Client Access License, or a similar product, is displayed on the Convert License page.

CAUSE

This issue occurs because of the installation the 2007 Microsoft Office servers…

This issue occurs because of the installation the 2007 Microsoft Office servers Service Pack 2 that was available prior to July 29, 2009. All installations of this service pack downloaded prior to that date will result in this issue.

RESOLUTION

On July 29th, the version of the service pack that caused this issue was replace…

On July 29th, the version of the service pack that caused this issue was replaced by one that no longer alters the expiration date. If you have downloaded and not yet deployed the service pack, you can determine which release you have by extracting the contents of the service pack.
For more information about how to extract files , click the following article number to view the article in the Microsoft Knowledge Base:

912203 (http://support.microsoft.com/kb/912203/ ) Description of the command-line switches that are supported by a software installation package, an update package, or a hotfix package that was created by using Microsoft Self-Extractor

The presence of osrvlicensing.msp and sserverx.msp indicates that you have the latest available version. If these files are not present, you should re-download the service pack from the download center. There have been no changes to the service pack other than the addition of these patches.
If you have already deployed the service pack and are experiencing the symptoms described above, the recommended solution is to apply the following updates available from the Microsoft Download Center.
Note This update is required to be installed on all SharePoint servers that are part of a SharePoint Server Farm.
Update for 2007 Microsoft Office Servers (KB971620), 32-Bit Edition

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Download

Download the Update for 2007 Microsoft Office Servers (KB971620), 32-Bit Edition package now. (http://download.microsoft.com/download/2/f/5/2f51ab71-1325-49d2-9cb9-18dec4780e99/office2007-kb971620-fullfile-x86-glb.exe)
Update for 2007 Microsoft Office Servers (KB971620), 64-Bit Edition

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Download

Download the Update for 2007 Microsoft Office Servers (KB971620), 64-Bit Edition package now. (http://download.microsoft.com/download/5/b/b/5bbd34a9-c528-42b0-8a5f-9a8997b25c32/office2007-kb971620-fullfile-x64-glb.exe)
After installing one of these updates, you do not need to redeploy the service pack. For information about how to deploy this update, please see the Microsoft TechNet article on deploying server updates:

http://technet.microsoft.com/en-us/library/cc263467.aspx (http://technet.microsoft.com/en-us/library/cc263467.aspx)

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 (http://support.microsoft.com/kb/119591/ ) How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
To resolve this issue manually, type the product key on the Convert License Type page. To do this, follow these steps:

  1. Click Start, point to All Programs, point to Administrative Tools, and then click SharePoint 3.0 Central Administration.
  2. Click the Operations tab.
  3. Click Convert License Type.
  4. In the Enter the Product Key text box, type your product identification number, and then click OK.
  5. The License Synchronizer Job will run on all computers in the farm after a few moments. After all the computers have updated their license from the timer job, the Convert License Type page will reflect the correct license.

If you do not have your product key, you can retrieve it by logging on to the Volume Licensing Service Center (https://www.microsoft.com/licensing/servicecenter/home.aspx) .
Note The manual solution will not work for Microsoft Search Server 2008 Express because it does not use a product key.
If the convert license type page no longer indicates you are in trial mode, the patch has been successfully applied.

Repost from Microsoft Support