Outlook Google Calendar Sync

Offers calendar synchronisation between Outlook and Google, including attendees and reminders.
Completely free, no install necessary, works behind web proxies and actively developed.

🚨 Not using OGCS yet? Get started over on the user site. 🚨

Continually Improving

A lot of work has gone in to this project.
If you would like to support me and further development of this tool, please
If you find a bug, help squash it! 🐞

Downloads & Statistics

⚙️ See the wiki for install, configuration guides and more.

v2

Latest Beta Release:

💾 Installer
     

📦 Portable ZIP
     

ℹ️ Upgrades to this release
     
     

Latest Alpha Release:

💾 Installer
     

📦 Portable ZIP
     

ℹ️ Upgrades to this release
     
     

v3

Latest Alpha Release:

💾 Installer
     

📦 Portable ZIP
     

ℹ️ Upgrades to this release
     
     

Functionality

• Supports all versions of Outlook from Outlook Online to Classic clients 2003 all through to 2024 64-bit!
  • Including Microsoft365 releases from the General Availability channel
  • For "New Outlook", v3 OGCS must be used
• Installable and portable options - even runs from a USB thumbdrive
• Synchronises items in any calendar folder, including those shared with you, from
  • Outlook ➡️ Google
  • Outlook ⬅️ Google
  • Outlook ↔️ Google (two-way/bidirectional sync)
• Supports configuring multiple calendars for sync
• Includes the following calendar item attributes:
  • Subject
  • Description
  • Location
  • Attendees (including whether required or optional)
  • Reminder events
  • Availability (free/busy)
  • Privacy (public/private)
  • Colour / category (custom mappings supported)
• Exclude calendar items by:
  • Availability (free/tentative)
  • Privacy (private)
  • Title/subject
  • Outlook category
  • Google colour
• Differential comparison updates only attributes that have changed
• Customisable date range to synchronise, past and future
• Frequency of automatic syncs, including push-sync from Outlook
• Configurable proxy settings, or use Internet Explorer's
• Merge new events into existing on destination calendar
• Prompt on deletion of items
• Ability to obfuscate custom words for privacy/security
• Option to force items as public or private in target calendar
• Syncs recurring items properly as a series
• Can run unobtrusively in the system tray, with bubble notifications on sync
• Application can start on login, with delay if required

Screenshots