AT&T M7 on 4..4.2 does not see Lollipop update.

Long story short I have an M7 running 4.4.2 on AT&T that I haven't touched in about a year. I just booted it up everything is working properly except when I go to Software Update it tells me the software is up to date and that I can check again in 24 hours.

I've tried rebooting, no luck. Any other ideas? Thanks!