If you choose 'Yes', then these calendars will no longer sync over CalDAV and thus will not work with third party apps. with the Apple iOS bug that was fixed just this Spring (2011) with iOS 4.3, prior to that bug fix, a Decline by.
From this point forward, iPhone OS was renamed iOS. iPhone13C2 = iPhone 12 Mini (?) iPhone13C3 = iPhone 12 Pro iPhone13C5 = iPhone 12 Pro Max. iOS devices unfortunately do not register with ActiveSync or other tools with a logical clear human readable version number.Just change the “Mail Days to Sync” field to “No Limit”. Reset Network settings via Settings -> General -> Reset -> Reset Network Settings. Go back all your mail accounts and reset password.
