Samsung: Security Update Required

Recently my samsung S3 keep prompt this error message “Update security settings to use” and after click on OK still failed to retrieve email. It was struggled me about 2 weeks and I really need to fix this. Luckily my boss didn’t notice yet why I’m slow in reply email lately. After tried few methods and seem not working.

1. Manually set the server setting on the mobile device to m.outlook.com
2. Add PIN to lock screen
3. Delete account and reboot
4. …etc

Finally this work for me.
Go into Settings, Security,  Device Administrators and remove the existing one for Email. Re-configure the exchange mailbox and it work !