Hello,
Thank you for posting in Q&A forum.
To further reset the domain trust between parent and child domain,
Please kindly follow below steps:
1.At a command prompt, type the following command, and then press ENTER:
2.Reset the trust password by below command:
netdom trust parent domain name /domain:child domain name /resetOneSide /passwordT:password /userO:administrator /passwordO:*
3.When you run this command in the child domain, use the following command syntax:
netdom trust child domain name /domain:parent domain name /resetOneSide /passwordT:password /userO:administrator /passwordO:*
For further details please refer to below Microsoft Official Documentation:
https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/forest-recovery-guide/ad-forest-recovery-reset-trust
To help other customers who may be facing the same issue, please don't forget to vote if the reply is helpful.
Best regards,
Jill Zhou