OutlookGoogleCalendarSync

# 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.

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

### 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 [](https://phw198.github.io/OutlookGoogleCalendarSync/donate) If you find a bug, [help squash it](https://github.com/phw198/OutlookGoogleCalendarSync/wiki/Reporting-Problems)! :lady_beetle: ## Downloads & Statistics :gear: [See the wiki](https://github.com/phw198/OutlookGoogleCalendarSync/wiki) for install, configuration guides and more. ## v2 ### Latest Beta Release: [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/latest) [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/latest) :floppy_disk: [Installer](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v2.12.0-beta/OGCS_Setup.exe)      [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v2.12.0-beta/OGCS_Setup.exe) :package: [Portable ZIP](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v2.12.0-beta/Portable_OGCS_v2.12.0.zip)      [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v2.12.0-beta/Portable_OGCS_v2.12.0.zip) :information_source: Upgrades to this release             ### Latest Alpha Release: [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/tag/v2.12.2-alpha) [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/v2.12.2-alpha) :floppy_disk: [Installer](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v2.12.2-alpha/OGCS_Setup.exe)      [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v2.12.2-alpha/OGCS_Setup.exe) :package: [Portable ZIP](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v2.12.2-alpha/Portable_OGCS_v2.12.2.zip)      [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v2.12.2-alpha/Portable_OGCS_v2.12.2.zip) :information_source: Upgrades to this release             ## v3 ### Latest Alpha Release: [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/tag/v3.0.4-alpha) [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/v3.0.4-alpha) :floppy_disk: [Installer](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v3.0.4-alpha/OGCS_Setup.exe)      [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v3.0.4-alpha/OGCS_Setup.exe) :package: [Portable ZIP](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v3.0.4-alpha/Portable_OGCS_v3.0.4.zip)      [](https://github.com/phw198/OutlookGoogleCalendarSync/releases/download/v3.0.4-alpha/Portable_OGCS_v3.0.4.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](https://learn.microsoft.com/en-us/windows/deployment/update/get-started-updates-channels-tools#general-availability-channel) 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/out of office) - 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