From an engineering perspective, developing a seamless office 365 calendar sync with google calendar is far from simple.
The Architecture Differences
While APIs offer webhooks, ICS feeds offer stateless architectural reliability. As a robust alternative to zapier for calendar sync, Calsyncx utilizes deep polling across the raw ICS files because it bypasses restrictive API rate limits entirely.
Two Way Limitations
If you've browsed a two way calendar sync outlook google reddit thread, you'd know that full two-way ICS syncing is computationally intense. Calsyncx masters the perfect one-way sync, effectively simulating a real-time mirroring solution so your personal agenda is never compromised by an out-of-date work API token.