TrueSight Server Automation (TSSA) - Active Directory users unable to login into TSSA Console it shows an error No valid credentials provided (Mechanism level:Server not found in kerberos database (7)) - Knowledge
![How to install Kerberos KDC Server and Client on Ubuntu 18.04 - Linux Tutorials - Learn Linux Configuration How to install Kerberos KDC Server and Client on Ubuntu 18.04 - Linux Tutorials - Learn Linux Configuration](https://linuxconfig.org/wp-content/uploads/2019/01/Kerberos_Overview.png)
How to install Kerberos KDC Server and Client on Ubuntu 18.04 - Linux Tutorials - Learn Linux Configuration
KB438623: KDC_ERR_S_PRINCIPAL_UNKNOWN error shown in the network log while requesting a service ticket during Kerberos database pass-thru authentication
![Thinlinc on Debian 11 w/ SSSD - Server not found in Kerberos database - Not ThinLinc - ThinLinc Community Forum Thinlinc on Debian 11 w/ SSSD - Server not found in Kerberos database - Not ThinLinc - ThinLinc Community Forum](https://europe1.discourse-cdn.com/standard21/uploads/thinlinc/original/1X/53a291e5bef463401ef7150d74665785a0370b1c.png)
Thinlinc on Debian 11 w/ SSSD - Server not found in Kerberos database - Not ThinLinc - ThinLinc Community Forum
![active directory - Cannot get Kerberos service ticket: KrbException: Server not found in Kerberos database (7) - Stack Overflow active directory - Cannot get Kerberos service ticket: KrbException: Server not found in Kerberos database (7) - Stack Overflow](https://i.stack.imgur.com/VWsAr.png)
active directory - Cannot get Kerberos service ticket: KrbException: Server not found in Kerberos database (7) - Stack Overflow
![active directory - Cannot get Kerberos service ticket: KrbException: Server not found in Kerberos database (7) - Stack Overflow active directory - Cannot get Kerberos service ticket: KrbException: Server not found in Kerberos database (7) - Stack Overflow](https://i.stack.imgur.com/9OWzE.png)
active directory - Cannot get Kerberos service ticket: KrbException: Server not found in Kerberos database (7) - Stack Overflow
![Thinlinc on Debian 11 w/ SSSD - Server not found in Kerberos database - Not ThinLinc - ThinLinc Community Forum Thinlinc on Debian 11 w/ SSSD - Server not found in Kerberos database - Not ThinLinc - ThinLinc Community Forum](https://europe1.discourse-cdn.com/standard21/uploads/thinlinc/original/1X/408bafa383e53cc0701cf8069c1f3841cd8c745c.png)