... Microsoft Graph Workarounds for SEQUENCE and RECURRENCE edge cases Testing infrastructure for every update scenario Many teams try this and eventually realise it becomes its own infrastructure project. If you want to avoid building that system yourself, Synara handles the cross vendor differences automatically: https://synara.events Synara

... everyone, here's a quick update on Synara , my API for delivering calendar invites that don t break across Google, Outlook, Apple, and ICS. We re finally getting close to launch, and I wanted to share where things stand and what s left. Where we're at Over the last few weeks, I ve been tightening the fundamentals: Google Calendar sync is done Real two-way updates, no hacks, no scraping, no unofficial endpoints. Proper conflict handling + clean ACE envelopes ... ... Microsoft is next Graph is a minefield of inconsistent behaviours depending on account type, delegated vs

... refreshed yet, and you have no way to force it. The only reliable tricks are versioned URLs, tight caching headers and smaller feed windows. Everything else is guesswork. This is also one of the reasons I am building Synara. It handles event consistency upstream so you do not rely on each client s refresh behaviour to interpret updates correctly. It does not fix subscription polling, nobody can, but it removes the ICS headaches that usually get blamed ... ... category. Comment from Sam Benson(@sambenson): @abod_rehman That s absolutely right! ICS and calendar providers in general can be a head-scratcher, especially as it s never obvious what exactly isn t working. That was the inspiration behind Synara

... with this long enough, I realised the real issue isn t how we send events. It s the format underneath everything. So I built ACE , a modern JSON event envelope for JSCalendar, designed to remove ICS ambiguity entirely. And Synara is the service layer on top of it: a clean, predictable event and invite API that keeps Google and Outlook in sync without hacks. Synara

... None of this is theoretical. I hit every single one of these while building an event system last month. The calendar layer becomes a pile of vendor-specific logic that you end up maintaining forever. So I built Synara to remove all of that. Instead of forcing developers to juggle three (incompatible) ecosystems, Synara