What is the grey keyhole icon or notification at the top of my Droid Turbo 2

[AC Question]

This icon appears on the top of my phone and it is next to the facebook notifications and maps notifications

 

[the tall guy]

Hi, please create an account and upload a screenshot showing us what the icon looks like.

If you need additional help or have more questions or details to share, please join the site so you can reply in this thread. See this link for instructions on how to join Android Central.