SEC_E_WRONG_CREDENTIAL_HANDLE Fix That Actually Works

Yeah, that error is a pain. You're staring at your screen wondering why your app just died with SEC_E_WRONG_CREDENTIAL_HANDLE (0x80090336). Let's fix it.

The Quick Fix: Clear Kerberos Tickets and Rebuild Context

Most of the time, this error pops up because you've got a stale Kerberos ticket or you're reusing a credential handle that's no longer valid. The security context—that's the handshake between your client and server—was built with one credential, and now you're trying to use a different one. Windows doesn't let you mix and match.

First step: flush the Kerberos ticket cache. Open a command prompt as admin and run:

klist purge

That clears all cached tickets. Then restart your application or service. If it's a custom app, make sure it's re-initializing its security context from scratch, not reusing an old handle.

If you're in a .NET environment, you might see this when using NegotiateStream or WindowsIdentity.RunImpersonated. The fix is to create a new WindowsIdentity instead of trying to use the same one across multiple operations. Here's a quick example:

using (WindowsIdentity identity = WindowsIdentity.GetCurrent())
{
    using (WindowsImpersonationContext ctx = identity.Impersonate())
    {
        // Do your authenticated call here
    }
}

Make sure you're not caching that WindowsImpersonationContext and reusing it later. I've seen devs store it in a global variable for “performance” and then wonder why their calls fail after a few minutes.

Why This Works

The error code 0x80090336 translates to “the supplied credential handle does not match the credential associated with the security context.” In plain English, your app is trying to use a credential that was already used to build a security context, but you're reusing it for a new context. Each security context needs its own credential handle.

When you purge the Kerberos tickets, you're forcing Windows to re-authenticate from scratch. That clears any mismatched state. And when you rebuild the security context instead of reusing an old handle, you're giving the system what it expects: a fresh start.

I had a client last month whose entire print queue died because of this. Their print server was using a service account that had a cached ticket from before a password change. The service kept throwing SEC_E_WRONG_CREDENTIAL_HANDLE every time a user tried to print. Purging the tickets and restarting the spooler fixed it in two minutes.

Less Common Variations

1. Service Account Password Changed

If you changed the password for the service account running your app, that account might still be using old tickets. Even after a password change, existing sessions can hold onto old credentials until they expire. The fix: restart the service after purging tickets. But also check that the service is configured to use the new password—sometimes the service won't pick it up until a restart.

2. App Pool Recycling in IIS

In IIS, if you have an application pool that's using a custom identity, and you recycle the pool while requests are in flight, those requests might throw this error. The fix is to increase the app pool's idle timeout or set it to recycle at a specific time. Also, make sure your app pool identity matches the account that has access to your backend resources. Don't let one app pool impersonate a different user than the one it runs as.

3. Domain vs. Local Account

If your app is running under a local account but trying to access network resources that require domain authentication, you'll get this error. The local account can't present credentials to the domain. The fix is to run the app under a domain account or use explicit domain credentials in your authentication call. I've seen this with scheduled tasks that run under SYSTEM but try to access a network share. SYSTEM is a local account, so it can't do Kerberos to a remote server unless you configure delegation.

Prevention Tips

To keep this from biting you again:

• Don't cache credential handles. Create a new one for each security context. The overhead is minimal compared to the headache of debugging this error at 2 AM.
• Monitor your Kerberos ticket lifetimes. If you have long-running processes, they may expire tickets mid-operation. Set up your app to handle re-authentication gracefully.
• Use group managed service accounts (gMSA) for services. Windows automatically updates the password for gMSAs, so you don't have to worry about stale credentials after a password change.
• Restart services after password changes. It's boring, but it saves you from a world of hurt.

That's it. Clear your tickets, rebuild your context, and you're back in business. If you're still stuck, check the event logs for the exact failing process—that'll point you to which credential is mismatched.