<img src="docs/images/ogcs128x128.png" valign="middle"> 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.

<p align="center"><b>:rotating_light: Not using OGCS yet? Get started <a href="https://phw198.github.io/OutlookGoogleCalendarSync/">over on the user site</a>. :rotating_light:</b></p>

Continually Improving

<img src="docs/images/development.png" v align="left" width="100px"/> 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! :lady_beetle:

<a href="https://bsky.app/profile/ogcalsync.bsky.social"><img src="docs/images/home_bluesky_follow.png" align="center"></a> <a href="https://bsky.app/intent/compose?text=I%27m%20using%20this%20Outlook-Google%20calendar%20sync%20software%20-%20completely%20%23free%20and%20feature%20loaded!%20%23recommended%20download%20from%20https://www.OutlookGoogleCalendarSync.com%20via%20%40ogcalsync.bsky.social"><img src="docs/images/home_bluesky_post.png" align="center"></a>

Downloads & Statistics

:gear: See the wiki for install, configuration guides and more.

v2

Latest Beta Release:

:floppy_disk: Installer
     

:package: Portable ZIP
     

:information_source: Upgrades to this release
     
     

Latest Alpha Release:

:floppy_disk: Installer
     

:package: Portable ZIP
     

:information_source: Upgrades to this release
     
     

v3

Latest Alpha Release:

:floppy_disk: Installer
     

:package: Portable ZIP
     

:information_source: 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 :arrow_right: Google
  • Outlook :arrow_left: Google
  • Outlook :left_right_arrow: 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