How to increase the Kerberos ticket time?

To increase the Kerberos ticket time, you need to modify the Maximum lifetime for user ticket and Maximum lifetime for user ticket renewal policies in the Group Policy Editor. These policies can be found under Computer Configuration > Policies > Windows Settings > Security Settings > Account Policies > Kerberos Policy.

The Ticket-Granting Ticket (TGT) time-to-live (TTL) is the maximum amount of time that a TGT can be used to request additional tickets. The default TGT TTL is 10 hours.

To configure or change the TGT time by Group Policy, you can follow these steps:

• Open the Group Policy Management console and create or edit a Group Policy Object (GPO).
• Navigate to Computer Configuration > Policies > Windows Settings > Security Settings > Account Policies > Kerberos Policy.

• Double-click “Maximum lifetime for user ticket renewal” and select the “Define this policy setting” option.
• Enter the desired TGT TTL value in hours in the “Maximum lifetime for user ticket renewal” field.

• Click “OK” to save the changes.

Note that increasing the Kerberos ticket time may have security implications, as it increases the risk of unauthorized access if a ticket is stolen or compromised. Therefore, it is important to balance security and usability when setting these policies.

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