Hi, you might get a better response to this question by providing more information. That being said:

Is the machine still bound to the ldap/AD domain?
Is the domain still in the search policy with Directory Utility?
Can you successfully run the "id" command for a domain user?

Having the same issue, but on new OOB machines that shipped with Catalina. Answers to the questions are in order, Yes, Yes, and No.