Single sign-on error with Lotus Sametime 8.0.2 Standard client

At my workplace, we recently deployed the Sametime 8.0.2 client throughout our company and had several instances of the following issue:


















(Text reads: Single sign-on account is invalid, the possible reason is your operating system account has been changed. You can try to recover your operating system's password to the old one, or inform the administrator.)

After seeing this error, the Login button stays grayed out, and normally we have to kill the process (if ST doesn't crash). Well I contacted Lotus support and finally got the following resolution:

The Sametime UIM client stores the hashed Sametime password in the following keystore file;
\Application Data\Lotus\Sametime\.metadata\.plugins\com.ibm.rcp.security.auth\.keystore.jks.J9

Can you please delete or remove the keystore file, restart the client and save the password/auto-login options. Please let me know if this does not resolve your issue.

This seems to have resolved the issue. I'm still waiting to hear back from support to see why this happens and if there's a way to resolve it.

(We also saw this issue at one site where ST 8.0.2 was installed, working ok, and then due to a transition project the domains of the PCs were changed, which caused the error to come up again. By the way, we don't use single sign-on, so not really sure where the error is coming from!)