I assume you really mean Active Directory domains since thats what we join - not LDAP domains

sure - as long as the trust is in the right direction

A one-way incoming trust allows users in your (trusted) domain to be authenticated in the other (trusting) domain, whereas a one-way outgoing trust allows users in the other (trusted) domain to be authenticated in your (trusting) domain.

more info available from Microsoft:

Trust Technologies: Domain and Forest Trusts | Microsoft Docs

so how can we do two things;

1. do a network capture of the user authentication to see what is happening when it denies access.

2. Is there a way of testing whether access is allowed/denied to a file and if denied where in the process it is denied like server_cifssupport --accessright ( yes I know its a VNX command )