What happens if the TGT token is not renewed before it expires?

If the TGT (Ticket Granting Ticket) token in Active Directory is not renewed before it expires, the user may experience interruptions or difficulties when accessing network resources. When the TGT token expires, the user’s computer or device will need to obtain a new TGT token by re-authenticating with the KDC (Key Distribution Center).

If the TGT token is not renewed before it expires and the user attempts to access a network resource, the following may occur:

1. The user’s computer or device sends a request for a service ticket to the KDC.
2. The KDC checks the user’s TGT token and sees that it has expired.
3. The KDC sends a response indicating that the TGT token is no longer valid and that the user needs to re-authenticate to obtain a new TGT token.
4. The user’s computer or device prompts the user to re-enter their credentials to obtain a new TGT token.
5. The user re-authenticates with the KDC to obtain a new TGT token.
6. The user’s computer or device uses the new TGT token to request a service ticket and access the network resource.

The process of obtaining a new TGT token after the previous one has expired can take some time and may cause delays or interruptions when accessing network resources. To avoid such interruptions, it is recommended that users or their devices automatically renew the TGT token before it expires, as explained in the previous answer.

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