Syncing Contacts and Calender Events across multiple Mac Desktops, iPhone and iPad
I am helping a friend who has multiple Mac Desktops, an iPhone and an iPad. No non-Apple products.
He keeps these devices up to date with the updates as and when they are released/offered on each device (although the desktops are not in the same geographic location so there can be some time between each one being used).
We have set up all 4 devices to sync using iCloud for contacts and for calendars.
The functionality the he wants to achieve is to have all the contacts and calendar events synced across all his devices. He understands that there may be a delay between adding a contact on one of the devices and it appearing on another. The issue we're having is that some events/contacts do sync fine, but some don't sync.
If there was a systematic issue of x being added to y device not showing on z device(s) then we could work with that. The issue we're having it is seems to be intermittent as to what is and isn't syncing.
I understand there isn't an actual force sync button on any of the devices.
Has anyone had this issue and found a way to either force syncing or to make it more reliable?