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Active Directory Forest Recovery - Reset the krbtgt password

Use the following procedure to reset the krbtgt password for the domain. The following procedure applies writeable DCs, but not read-only domain controllers (RODCs).

Important

If you plan to recover RODCs online during the forest recovery, do not delete the krbtgt accounts for the RODCs. The krbtgt account for an RODC is listed in the format krbtgt_number.

If you use a customized password filter (such as passfilt.dll) on a DC, then you might receive an error when you try to reset the krbtgt password. For more information, including a workaround, see Microsoft Knowledge Base article 2549833.

Reset the krbtgt password

  1. Select Start, point to Control Panel, point to Administrative Tools, and then select Active Directory Users and Computers.
  2. Select View, and then select Advanced Features.
  3. In the console tree, double-click the domain container, and then select Users.
  4. In the details pane, right-click the krbtgt user account, and then select Reset Password. Reset password
  5. In New password, type a new password, retype the password in Confirm password, and then select OK. The password that you specify isn't significant because the system will generate a strong password automatically independent of the password that you specify.

Important

You should perform this operation twice. When resetting the Key Distribution Center Service Account password twice, a 10 hour waiting period is required between resets. 10 hours are the default Maximum lifetime for user ticket and Maximum lifetime for service ticket policy settings, hence in a case where the Maximum lifetime period has been altered, the minimum waiting period between resets should be greater than the configured value.

Note

The password history value for the krbtgt account is 2, meaning it includes the 2 most recent passwords. By resetting the password twice you effectively clear any old passwords from the history, so there is no way another DC will replicate with this DC by using an old password.

Next steps