We just did a migration from Data Ontap 8.2 7 mode to Clustered mode 8.2.2 for our Cifs protocol volumes.
Users from outside the domain where authenticated with their UPN "email@example.com"
After the migration with the 7-mode migration tool to clustered Ontap Cifs, users who are outside the domain, for example with an Ipad, they cannot login with their UPN anymore.
They can login with \domainname\username.
Users who are inside our Domain network for example a workstation which is a domainmember can login with their UPN.
Any thoughts on this?