Sign Out of iCloud and Save Data

1. Go to iPhone’s Home screen and launch the Settings app.

2. Click [Your Name] on top of the page.

3. Scroll down to find the option “Sign Out” and click it.

4. Before signing out of the iCloud account on your iPhone, if you’ve activated Find My iPhone, the first pop up will request that enter your Apple ID password to turn it off.

5. Enter your Apple ID password and then click on “Turn Off”.

If you don't know your password, you can reset it via email (https://iforgot.apple.com/password/verify/appleid).

IT should have set it up for you initially and may be able to help with security questions or the initial password as well

6. Turn on the switch of the data you would like to keep on your device (Contacts only is most likely).

7. Double click “Sign Out” to confirm your request.