Hi,
Thank you for posting in Microsoft Q&A forum.
1,Please help check the smsts.log and Netsetup.log to see if there is any further information about the service accout used to join domain.
2,Do you change anything of the service account, for example change password? If yes, please enter the password again in the Task Sequence in all of the Steps that contains the credentials of this user to have a try.
3,You can also create a new identical task sequence to have a try.
Thanks for your time. Have a nice day!
Best regards,
Simon
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.