Active Directory Desktop Single Sign-On known issues
The following are known issues when implementing a new Desktop Single Sign-On (DSSO) configuration or migrating an existing DSSO configuration:
- Agentless DSSO doesn't work if a single user is a member of more than 600 security groups or if the Kerberos token is too large for Okta to consume. If a user with a large Kerberos packet implements or migrates agentless DSSO, a 400 response appears and they're redirected to the regular sign-in page.
- Windows functional level 2008 or below uses a less secure encryption RC4. Okta recommends upgrading to Windows functional level 2008 or above to make sure you're using the most secure encryption algorithm.
- When agentless DSSO is re-enabled, Identity Provider (IdP) routing rules must be manually reactivated.
- Agentless DSSO doesn't work when delegated authentication is disabled and Don't create Okta password is selected. To learn more about delegated authentication, see Delegated authentication.
- The default sign-in page used for automatic DSSO failover doesn't support HTML customization.
- An infinite redirection loop can occur when the Identity Provider (IdP) customer error page and the org URL are the same.
- When the service account username and the Active Directory user account name don’t match, agentless DSSO can fail. When this happens, you're returned to the default sign-in page and a GSS_ERR error appears in the System Log. The service account username and the Active Directory user account are case sensitive and must match.
- RC4_HMAC_MD5 encryption isn't supported with ADSSO and Office 365 Silent Activation. When using ADSSO or Office 365 Silent Activation, Okta recommends using AES 128-bit (AES-128) or AES 256-bit (AES-256) encryption. If the KDC_ERR_ETYPE_NOTSUPP error appears in the Windows Event Viewer when you implement AES encryption, see Kerberos Unsupported etype error.
- Microsoft Edge (legacy) isn't supported. The new Chromium-based Edge is supported.
- Microsoft Teams versions 18.104.22.168 and later are supported.