Error message when you try to add an Active Directory user account as a contact in Outlook 2007: "There is not enough memory to perform the operation"

You try to add an Active Directory directory service user account as a contact to your Contacts list in Microsoft Office Outlook 2007. When you click Save & Close to save the contact to your Contacts list, you may receive the following error message:

This problem occurs if the e-mail account for the contact has more than 20 certificates that are associated with the e-mail account, and the total certificate data exceeds 32 KB.

How to obtain the hotfix

This issue is fixed in the Outlook 2007 post-Service Pack 1 Hotfix Package that is dated January 28, 2008. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To enable the hotfix, follow these steps:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following subkey in the registry:
   HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security
3. On the Edit menu, point to New, and then click DWORD Values.
4. Type StripCertsNotValidForMail, and then press ENTER.
5. On the Edit menu, click Modify.
6. Type 1, and then click OK
7. Exit Registry Editor.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.