How to set up calendar and contacts synchronization on Outlook or Google with PC and mobile devices?

Question

Data synchronization

Help set up calendar and contacts synchronization on Outlook or Google with PC and mobile devices.
Ideal:
Synchronize Outlook (installed on PC and laptop) with smartphones, etc. Through the Outlook.com cloud or Gmail or other clouds.
A month ago, everything worked (PC and mobile were synchronized with the Outlook.com cloud)
But Outlook sent a letter about reconnecting the account. I did everything 3 times, but the synchronization was gone.
I'm building Outlook 2016.

Answer 1

Understood.
Morons from Microsoft wrote illogical instructions for connecting to Aultuk's account.