When you use a Microsoft Windows Server 2003-based domain controller to join a Microsoft Windows XP-based client computer to a domain, you may receive an error message that resembles the following on the client computer:
The following error occurred attempting to join the domain "domain_name.com": Not enough storage is available to complete this operation.
Additionally, the following Warning message may be logged in the System log on the client computer:
Event Type: Warning Event Source: Kerberos Event Category: None Event ID: 6 Date: Date Time: Time User: N/A Computer: Computer_Name Description: The kerberos SSPI package generated an output token of size 36E7 bytes, which was too large to fit in the 36D3 buffer provided by process id 0. If the condition persists, please contact your system administrator.
This problem occurs because the Kerberos token that is generated during authentication is more than the fixed maximum size. In the original release version of Microsoft Windows 2000, the default value of the MaxTokenSize registry entry was 8,000 bytes. In Windows 2000 with Service Pack 2 (SP2) and in later versions of Windows, the default value of the MaxTokenSize registry entry is 12,000 bytes.
For example, if a user is a member of a group either directly or by membership in another group, the security ID (SID) for that group is added to the user's token. For a SID to be added to the user's token, the SID information must be communicated by using the Kerberos token. If the required SID information exceeds the size of the token, authentication is unsuccessful.
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:
322756 How to back up and restore the registry in Windows
To resolve this problem, increase the Kerberos token size. To do this, follow these steps on the client computer that logs the Kerberos event.
Click Start, click Run, type regedit, and then click OK.
Locate and then click the following registry subkey:
On the Edit menu, point to New, and then click Key.
Type Parameters, and then press ENTER.
On the Edit menu, point to New, and then click DWORD Value.
Type MaxTokenSize, and then press ENTER.
On the Edit menu, click Modify.
In the Base area, click Decimal, type 65535 in the Value data box, and then click OK.
Note The default value for the MaxTokenSize registry entry is a decimal value of 12,000. We recommend that you set this registry entry value to a decimal value of 65,535. If you incorrectly set this registry entry value to a hexadecimal value of 65,535, Kerberos authentication operations may fail. Additionally, programs may return errors.For more information, click the following article number to view the article in the Microsoft Knowledge Base:
297869 SMS administrator issues after you modify the Kerberos MaxTokenSize registry value
Exit Registry Editor.
Restart the computer.
For more information about how to use the Tokensz tool to compute the maximum token size, visit the following Microsoft Web site: