Outlook contacts are not syncing with different devices on Office 365
One of my users has 14,694 contacts in his account. His account is set up on the executive assistance's outlook and he has an iPhone and an iPad. sometimes the EA adds new contacts and he is not able to see them in mobile devices. another example is when he adds note to a contact and EA is not able to see in outlook.
anyone has a solution with syncing with multiple devices in office 365??