I use a pop3 (AT&T) for 2 email addresses (1 personal, 1 business). I am not able to sync any of my contacts and calendars with any of my devices since purchasing an upgrade subscription to MS Office 365 Pro. Email works fine. Missed appointments which is not good. No help from Microsoft Tech support either. I tried the "Configure outlook.com account for syncing" which Diane Poremsky from Slipstick Systems put out there a few years ago. Doesn't work for me. Any suggestions?