If it is disabled then the company would be the only people that can enable it. It also could be the carrier/service provider that required the restriction be on the phone, so people can't easily use the data for other devices. Happens all the time.
You can try making the seeing if you can make it a "Hotspot". However that may also be restricted.
If it is at all possible it would be done this way...
1. Go into "Settings" and in the "Wireless & networks" section tap "More".
2. Now tap "Tethering & portable hotspot".
3. For "Wireless Tethering" tap "Set up WiFi hotspot"
4. On this new screen you will see options for a "Network Name", "Security", "Password" and "Network Band". You can change them or keep them as is. It is really up to...