I have a Samsung Note 4 and have used Good for Enterprise. Calendar is not syncing.

[AC Question]

My company recently upgraded servers and i reloaded G4Ent. My calendar will not sync. It says Good for Enterprise does not support Android 4.4 (kitkat). I am a technical novice .. help
Do I need to download kitkat 4.4.4? Do not want to have to reset my phone either.