NetApp
Vserver : Configuration > Protocols > CIFS : Managing CIFS : Editing CIFS general properties
Editing CIFS general properties
You can modify the general properties for CIFS, such as default UNIX and Windows user.
Steps 
1.
From the Home tab, double-click the appropriate storage system.
2.
Ensure that the left navigation pane displays the Vservers hierarchy.
3.
In the navigation pane, select the Vserver and click Configuration > Protocols > CIFS.
4.
In the Configuration tab, click Options.
5.
In the Options dialog box, make the necessary changes and click OK.
Related reference 
CIFS window