If you use Symantec Endpoint Protection Manager authentication, the default option for passwords is set to expire after 60 days.
For 12.1.5 and later, you can display an option for administrators to use a password that never expires. This option is disabled by default to increase security, so you must enable it first. After you enable the option, the option appears on the Authentication tab for an administrator account.
To enable Symantec Endpoint Protection Manager logon passwords to never expire
In the console, click Admin.
On the Admin page, click Domains.
Under Domains, select the domain for which to allow administrators to save logon credentials.
Click Edit Domain Properties.
On the Passwords tab, click Allow never expiring passwords for administrators.
Click Admin > Administrators, and open the administrator account.
On the Authentication tab, click Password never expires, and then click OK.