Where is the Systems View List

Hello CRM Forum,

Trying to reactivate an Account in the CRM version of Microsoft Dynamics 365 Verwsion 1612 on premises.
I read
https://docs.microsoft.com/en-us/dynamics365/customer-engagement/basics/deactivate-activate-account-contact

which says one needs to
'view a deactivated account or contact, in the System Views list,'
This assumes one knows where the Systems View List is, which I don't.
So now a search is done for the System View List. 

https://community.dynamics.com/crm/b/crmsoftwareblog/archive/2018/01/05/managing-system-views-amp-dashboards-in-dynamics-365

This script says the method is to go  to Settings>Customizations>Customize the System.

But the Settings on the app provides Options, Print Preview, Apps for Dynamics, See Welcome Screen, About, Privacy Statement

The Options choice allows General, Activities, Formats, Email, Templates, Email, Languages 
No Customization.

These so called instructions that don't allow for a complete set of possibilities are infuriating.

How is an Account reactivated?

Thanks.

Allen Pitts, Dallas Texas