phone hacks!

I work for a small (but upcoming) company and for the last several months it's been nothing but an uphill battle. Our company was robbed, and then a conjoining shop caught fire, causing damage to our offices. Needless to say it's been one of those trying times. However, our employees have iPhones that they carry all the time, meant for business purposes. Before the burglary, we were checking those phones regularly, every 21-30 days with the occasional surprise check sooner than that. It's protocol that we have to follow to ensure our property is being used the way it's meant to. It's been almost 3 months since our phones were last collected, and because of my recent promotion, it's up to me to get it done. The only thing is I have no clue how to do it! Because they're iPhones the data can be cleared in settings but there's a way to pull it. Does anyone have any experience with this? Looking for help! 
UPDATE: I have no clue why this is showing on the general pregnancy board. I posted it to lifestyle!