OnePlus 2 (OxygenOS) Exchange calendar sync not working
Calendar is not listed as an option to sync in the same place with contacts and email. This was working with my old OnePlus One (CyanogenOS) with the same Exchange server. The only changing part here is my phone (and the OS).
David Clayton commented
After the grand success of OnePlus 3 and OnePlus 3T (the upgraded version of OnePlus 3), the makers are planning to launch the 4th generation of the series, the OnePlus 4 with even better features and specs. It would give tough competition to iPhones
when it releases because of the extraordinary features it would have. To know more about OnePlus 4, its <a href="http://www.oneplus4update.com/">OnePlus 4 Features</a> just take a look here.
Both phones have Boxer version 2.8.0 (245)
OxygenOS version 2.2.0
CyanogenOS version 12.1.1-YOG7DAS2K1