I am looking to move my small business off of POP email to something hosted. I have looked at Google Apps for Business and Office 365 but one crucial roadblock remains unanswered:
How can I restrict access to the services so that they are only available from within the office?
Just like how our current POP system works, I just want the employees to be able to access their email from within the office during work hours. Moving everything online opens the door to information leakage, and we can't have that.
I have found nothing for Office 365 and I have only found gControl for Google Apps, but it costs more per user than Google Apps itself. I also have no experience with SSO solutions (this is a really small business).
Best Answer
There is no option besides SSO, and gcontrol is the cheapest. Google is designed to be accessed from anywhere and until they implement a free solution to restrict access to IPs or times, only 3rd party SSO solutions with that feature will accomplish what you want to do.
Obviously if you want to truly restrict all email download to be in certain locations/times, you'll have to turn off POP and IMAP access. I use gControl and it works quite well.