NetApp
Configuration : Protocols > CIFS : Managing CIFS : Scheduling the frequency of password changes
Scheduling the frequency of password changes
You can schedule the domain password to be changed once a week to improve the security of the storage system.
Steps 
1.
From the Home tab, double-click the appropriate storage system.
2.
Under the selected host storage system, clickConfiguration > Protocols > CIFS.
3.
In the Domain tab, click Edit.
4.
Select the check box to schedule a weekly password change and click OK.
The password change occurs at approximately 1:00 a.m. on Sundays.
Related reference 
CIFS window

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