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Calendar Problems

How to Sync Microsoft Teams and Google Calendar Availability

Maira MehtabMaira Mehtab Sep 22, 2026 868 views

Question details

A company using Google Workspace needs to sync client availability with Microsoft Teams to prevent guest access from showing as 'Unknown'.

Product
Microsoft Teams / Google Workspace
Device & OS
not provided
Scenario
Trying to view accurate real-time client availability (free/busy status) in Microsoft Teams for users operating on Google Workspace.
Observed behavior
Guest access between tenants currently displays availability as 'Unknown' due to a lack of direct real-time calendar synchronization between the two platforms.
Before you start

Ensure you have administrator access to your Microsoft 365 or Google Workspace accounts, as configuring cross-platform calendar sharing often requires adjusting tenant-level permissions.

Solution 1Recommended

Share Google Calendar via ICS Link

Share your Google Calendar using an ICS link to allow Microsoft Teams or Outlook to subscribe to your free/busy information.

Because direct native real-time synchronization between Microsoft Teams and Google Calendar is not supported, sharing an ICS link is the most reliable workaround. This allows other platforms to subscribe to your calendar. Note that this sync is not strictly real-time and depends on the polling interval of the Microsoft client.

1
Access Google Calendar Settings

Open Google Calendar in your browser, click the gear icon in the top right corner, and select 'Settings'.

2
Select the Target Calendar

In the left sidebar, locate the 'Settings for my calendars' section and click on the specific calendar you wish to share.

3
Copy the ICS Link

Scroll down to the 'Integrate calendar' section and copy the URL provided under 'Secret address in iCal format'.

4
Subscribe in Outlook/Teams

Open Outlook on the web or desktop, go to 'Add Calendar', select 'Subscribe from web', and paste the copied ICS link so Teams can read your availability.

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Frequently Asked Questions

Why does my Teams availability show as 'Unknown' for external Google Workspace users?

Microsoft Teams and Google Workspace do not natively share real-time free/busy data. Unless a synchronization method, ICS subscription, or third-party tool is explicitly configured, external calendars cannot be read, resulting in an 'Unknown' status.

Can I use an Exchange organization relationship to sync with Google Calendar?

No. Microsoft 365 administrators can create an Exchange organization relationship to share free/busy information, but this feature is strictly limited to sharing data between two Microsoft 365 or Exchange organizations, not with Google Workspace.

Are there costs associated with syncing Teams and Google Calendar using third-party tools?

It depends on the tool you select. While some automation platforms offer free tiers with limited sync frequencies or basic triggers, dedicated real-time synchronization solutions designed for enterprise use typically require a paid subscription.