If you use Azure NetApp Files or NetApp ONTAP, you may see an “Invalid credentials” error when opening an SMB share after October’s Windows Server update.
Microsoft warned admins nearly a month after the update shipped.
Windows Server now requires a Kerberos LDAP service ticket that matches the domain controller handling the request. Some NetApp configurations authenticate differently, so the server rejects the request. Apps can also lose the ability to find the domain, map account names or look up users and groups.
Microsoft has documented a temporary Registry workaround, but applying it weakens the new LDAP protection. NetApp is working on a fix and has yet to announce a release date.





































