Hi, for anyone that finds this thread and needs to understand what's failing here. This issue with VNX is a limitation by design, or perhaps a bug as stated by luisnyc, issue which you can read more about in this Dell article: https://www.dell.com/support/kbdoc/en-us/539069
If you don't have a Dell account, you can't view the content, but the article basically states that the VNX devices will not accept CIFS connections with Kerberos tickets granted by 2016/2019 Domain Controllers.
I personally haven't seen the issue with 2016, only with 2019.
