I am starting a project management company where workers connect remotely, share information and collaborate on projects. Video conferencing may also be necessary. I prefer to host locally but with capability of cloud integration or extension. Starting off with 50 users that can expand as the company grows. employees will log into their own user work area and perform their work from there. Also will give temporary access to contractors as needed. Network will ultimately be comprised of application server, database server, NAS, VPN, router etc.
I am considering as the application server Windows Server 2012 r2 and clearOS. I have read where ClearOS Is a good alternative to windows. I prefer a OS that will probably require the least amount of maintenance, down time , but high on flexibility and ease to configure.
Thanks in advance.