The VMware Knowledge Base provides support solutions, error messages and troubleshooting guides
Enabling Windows Single Sign-on support in VirtualCenter 2.5 Update 2 (1006611)
To enable Windows Single Sign-on follow these steps:
Log in to a workstation where the VI Client is installed.
Right-click the desktop and select New > Shortcut.
In the Create Shortcut Wizard, click Browse and navigate to the location of the VpxClient.exe program and click OK.
Note: By default it is located in C:\Program Files\VMware\Infrastructure\Virtual Infrastructure Client\Launcher\
After the full path is in the Type the location of the item field append -passthroughAuth -s <VirtualCenter Server hostname> to the end of the line, where <VirtualCenter Server hostname> is the hostname or IP Address of the VirtualCenter instance you want to connect to.
Give a Name for the shortcut.
After the shortcut has been created, double-click on the new shortcut, and you are logged into the VirtualCenter Server using the currently logged in credentials.
Note: If the currently logged in user does not have appropriate permissions to VirtualCenter log in fails.
By default VirtualCenter uses the "Negotiate" Security Support Provider Interface (SSPI) from the Microsoft SSPI API for communication. Since VMware has fully implemented this interface, it is possible to change this behaviour to use "Kerberos" instead.
To change the default security SSP to Kerberos add the <sspiProtocol>Kerberos</sspiProtocol> parameter to the <vpxd>
node of the vpxd.cfg file on the VirtualCenter server.
Note: In a default configuration the vpxd.cfg file is located in the C:\Documents and Settings\All Users\Application Data\VMware\VMware VirtualCenter directory .
After the change is complete, the vpxd.cfg file appears similar to:
Request a Product Feature
To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.