the Sync-Server could not synchronize the iPhone

Dear Community,

I've got a problem with the synchronization of the iPhone with Outlook.

I get following error message by iTunes if I try to synchronize an iPhone 6+ (IOs 8.1.3) with Outlook 2010 (Installed on a Windows 7)

"iTunes couldn't synchronize "contacts" on the iPhone since the Sync-Server could not synchronize the iPhone" ( I translated it from German, so it eventually has not the same wording like the English error message).

I already tried to fix the Problem by restart the iPhone and the computer. Also I deleted the Sync-progress but didn't get rid of the problem.

I'm thankful for each tip

your sincerely

Synonyme