Keeping Outlook and Google Calendar in sync is usually done by subscribing to one calendar from the other using an iCal (ICS) link, or by using export/import or third‑party tools. Native two‑way, real‑time sync is limited to specific business tools (like Google Workspace Sync for Microsoft Outlook) or third‑party apps.
One-way sync: Show Google Calendar in Outlook
Get the Google Calendar iCal link
Open Google Calendar in a browser and sign in.
Under "My calendars" on the left, hover over the calendar you want, click the three‑dot menu, then select Settings and sharing.
In Integrate calendar, copy the Secret address in iCal format (or iCal URL).
Learn: https://support.microsoft.com/en-us/office/import-calendars-into-outlook-8e8364e1-400e-4c0f-a573-fe76b5a2d379
Add that calendar in Outlook on the web or desktop
Open Outlook Calendar (web: outlook.com or Outlook desktop signed into the same account).
Choose Add calendar → Subscribe from web (web) or Add Calendar → From Internet (desktop, Home tab in Calendar view).
Paste the iCal URL you copied, give it a name and color, and click Import/OK.
Your Google events appear under "Other calendars" in Outlook; Outlook periodically refreshes from Google (read‑only from Outlook’s side).
One-way sync: Show Outlook Calendar in Google Calendar
Get the Outlook Calendar ICS link
Go to Outlook on the web and sign in (Outlook.com or your Microsoft 365 account).
Open Calendar, click the gear icon → Calendar settings → Shared calendars (or Publish a calendar section).
Under Publish a calendar, pick the calendar, set permissions to Can view all details, and click Publish.
Copy the generated ICS link (not the HTML link).
Add that calendar into Google Calendar
Open Google Calendar in a browser.
On the left, click + next to Other calendars → From URL.
>> Paste the Outlook ICS link and click Add calendar.
>> The Outlook calendar appears under "Other calendars" in Google; updates flow from Outlook to Google on a delay (read‑only from Google’s side).
Export/import method (one-time copy)
In Outlook desktop, open Calendar, select the calendar, then File → Save Calendar to export an .ics file.
>> In Google Calendar, go to Settings → Import & export → Import, select the .ics file, choose the destination calendar, and import.
>> This copies existing events but does not keep syncing; repeat export/import when needed.
True two-way sync options
Google Workspace Sync for Microsoft Outlook (GWSMO): For Google Workspace (business/education) accounts, Google provides GWSMO, which installs on Windows and lets Outlook and Google sync mail, calendar, and contacts bidirectionally.
>> Third‑party sync apps: Tools like Outlook Google Calendar Sync or similar apps can create automatic two‑way sync between Outlook and Google calendars; they require installing a separate program and granting access to both accounts.
Mobile options
On iPhone or Android, you can simply add both your Outlook/Microsoft 365 account and your Google account to the built‑in Calendar app or to the Google Calendar/Outlook apps, then enable both calendars; the phone shows a combined view even if the servers are not fully synced.
Limitations and tips
Subscribed calendars (via ICS/iCal) are usually read‑only: you create/edit events only in the source calendar, and they propagate one‑way to the subscriber.
Refresh is not instant; it can take several minutes to hours for changes to appear in the other app.
For corporate/Exchange calendars, admins may restrict publishing or external sharing; if you do not see "Publish" or "Shared calendars" options, check with IT.
For ongoing, reliable two‑way sync, prefer official business tools like GWSMO (if eligible) or carefully chosen third‑party sync software.
Conclusion
Syncing Outlook with Google Calendar can be as simple or as powerful as you need it to be. If you only want visibility, the one-way ICS subscription works well and is easy to set up. For occasional transfers, export/import does the job. But if you’re looking for seamless, real-time updates across both platforms, you’ll need to rely on business tools like GWSMO or trusted third-party apps. Ultimately, the right approach depends on whether you prioritize simplicity or full two-way synchronization.
If you’d like to go deeper and master more advanced workflows and integrations, you can explore this Advanced Training playlist:
https://www.youtube.com/playlist?list=PLtWXonZV3rt7zGpRpvAoBlYVCwfSuvp1a
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