We have recently upgraded our Windows servers from 2012r2 to 2019 and would like to raise the AD from 2012 to 2019 but I would like to know if that will cause any effect on our cifs shares that NetApp is hosting.
Based on our Matrix, this should be supported with the version of Ontap and AD/DC version. You can check and verify via the link below (Choose the CIFS compatibility matrix):
SMB2 is on. I did check, and the only smb1 connections are coming from my Unitrends backup appliance. It has SMB2 enabled so I am not sure why it is connecting via smb1. I assume if I don't disable smb1 on the NetApp that will continue to work.
Re: FAS2552 in 7 mode cifs - upgrade AD from 2012 to 2019