OL2002: NK2 File Does Not Change Size After You Reduce the Number of Names in the Nickname Cache

After you edit the registry to allow fewer names in the nickname cache, the size of the file is not reduced.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

How to Change the Number of Names That Is Allowed in the Nickname Cache

The system administrators that roll out Microsoft Office or Microsoft Outlook for the first time are usually responsible for changing the number of names that are allowed in the nickname cache. However, individual users can also make this registry setting. In order to have control over how many names are in the nickname cache, you need to add a key to the registry. To do this:

1. Click Start, and then click Run.
2. In the Open box, type regedit, and then press ENTER or click OK.
3. Locate the following registry hive:
   H_KEY_CURRENT_USER\Software\microsoft\Office\10.0\outlook\
4. In the right pane, right-click and click New, and then click to select DWORD Value.
5. Right-click the new entry, and then type MaxNicknames.
6. Double-click the new key, and then type the number of maximum nickname entries in the Value Data box .
7. Exit the registry editor.