If you read your post you see an all too common plea and a lack of detail. That is, imagine that each calendar app is different (it is) and how Outlook 2007 was tuned by MSFT to really only work with Exchange Server. Not that folk haven't found work arounds but here's the basic.
Use some central server (Google Calendar?) for the calendar and fix each broke system to syn with that.
Bob
After having work done on my Windows Vista PC, I can no longer sync Calendars & Contacts between my Samsung Galaxy Tab 2 10.1, my Samsung Galaxy S4 phone, and Outlook 2007 and G-mail on my computer.
I've managed to get my phone and tablet to sync between themselves.
Can anyone help me?
Thanks,

Chowhound
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