Many professionals have Outlook at work and Google personally (or vice versa). Here's how to get both checked on every booking. Here's the practical setup.
Current state in Cal Clear
Cal Clear currently supports Google accounts (Workspace + Gmail). Microsoft 365 / Outlook support and CalDAV support (for iCloud, Fastmail, self-hosted) are on the 2026 roadmap. For pure-Google setups today, Cal Clear is a fit; for Outlook-first or iCloud-first users, it's roadmap.
Interim workaround: one-way sync
If you need to book clients on a Google calendar but also respect your Outlook or iCloud calendar, set up a one-way sync from the non-Google calendar into a dedicated Google calendar. Tools like CalendarBridge or OneCal handle this sync. Cal Clear then checks the synced Google calendar alongside your primary — not a perfect solution but works in most cases.
What to watch for
Sync latency, failed sync restarts after OAuth expirations, and edge cases around recurring events / meeting updates. The one-way sync approach works well for most individual users but breaks down for heavy team-scheduling contexts.
Part of the multi-calendar scheduling pillar guide.
Frequently Asked Questions
When will Cal Clear support native Outlook/iCloud?
Microsoft 365 OAuth and CalDAV are both on the 2026 roadmap. For users who need them today, the sync-to-Google workaround is the interim path.
Will Cal Clear eventually support Microsoft Teams calendars?
Teams calendars live in Exchange/M365, so native M365 support covers them. Yes, on the roadmap.
Unlimited calendars on every booking, free
Cal Clear checks every connected Google account on every booking-page request. Free forever, no tier gating.