Leave it on.   Or ... turn it off.  It doesn't matter.
Good morning  I have a question for my Dell server. I use my server only in my  company and not for to access to it by external places.  There are 9 hours almost that the server is on without to be used.  Is it advisable to shutdown the server for example at the 23.00 PM and to start it at 9.00 am or  would be on always ?  
Server on always or shutdown it the night