12.1.3 Security Sign Out

In administration->authnetication-authentication options->authentication time out

Thank you. Is this new? We did not have this previously 

Yes it was added 12.1

To give a bit more information on this: How do I control how long a user stays signed into my community? - User Documentation - Verint Community 12.x - Verint | Telligent Community

Believe this is the specific TE in the release notes:
TE-15758 - Improved sliding expiration support with external SSO support (Administration -> Authentication) 

To give a bit more information on this: How do I control how long a user stays signed into my community? - User Documentation - Verint Community 12.x - Verint | Telligent Community

Believe this is the specific TE in the release notes:
TE-15758 - Improved sliding expiration support with external SSO support (Administration -> Authentication)