Short answers to the things people actually write in about. Each one starts with the fix and explains it afterwards.
10 pages
Connecting accounts, choosing a direction, and building your first sync.
Appearance, filters, per-calendar exceptions, and the sync-wide settings.
Diagnose what happened before you change anything.
What each plan allows, and what the product will not do at all.
Want the full description of a setting rather than an answer to one problem? Docs covers that. And support will look at your actual setup.