I ran into a weird problem involving the synchronisation of contacts between Outlook (on a Windows Computer), an iPhone and an iPad.
It all began when I had to do a couple of changes to a number of contacts in Outlook on PC. I had to switch a couple of names (first-/last name). The changes did sync on the iPad without any issues. The contacts on the iPhone however remained unchanged. When I tried to Change the contacts manually on the iPhone a duplicate was created in Outlook as well as on the iPad.
It seems like the problem is for the iPhone to download the contact data from the Server.
Here are some specs of the devices.
iPad OS: iOS 11.4.1 iPhone OS: iOS 12.1.4
Does anyone have an idea how to fix that issue?