calendar deleted, how get it back in Outlook

Hi.

For some reason my iPhones or iPads no more synced with Outlook.

No matter if my old iPhone 4S or iPad, neither newer devices.

In the new iTunes version I can not select Outlook no more, it just says all is synced with icloud.

I would still like to have my dates on my PC.

I deleted calendar (which seems to be the iTunes calendar in outlook) some month ago, as I never knew what to do with that and it always was empty anyways. My dates in former times were usually synced with the original Outlook Kalendar, not the calendar.

Is there a way to get a sync back via Outlook?

Thx