Hi. This has now escalated in severity for us as due to server windows updates at the beginning of this year our older Mazaks running Win 95 or Win 2000 Pro cannot rejoin our domain. The server security level has rose so PCs without the right Trust credentials are not allowed access. This means that any machine that has to have a new hard drive for example and then needs to rejoin the domain cannot do so.
Having run through many attempts the PC can join the domain but is then disabled immediately and shows a Trust Relationship issue from other PCs.
I believe Microsoft are now counting the clock down to remove SMB1 completely and to stop these older OS's from being used.