Connecting Teams calendars with external services like Outlook for unified scheduling
Dear Toni&Cuea,
Good day.
Based on your description we understand that When you add your Teams/Outlook calendar to Google Calendar using the ICS address, only the initial appointments appear. Any subsequent changes (like modifying, canceling, or rescheduling appointments) made in Teams/Outlook do not reflect in Google Calendar.
After thorough research and consulting, it’s been concluded that it is the same method use by outlook/teams to add google calendar to outlook. This method doesn't allow two way sync. So far it is the same method you use to add outlook/teams calendar to google calendar. This method allows you to view your Google Calendar events in Outlook, but it doesn't provide two-way synchronization.
Any changes you make in outlook/teams Calendar won't be reflected in Google, and vice versa Unfortunately, as of now, there's no built-in feature in Outlook or Google Calendar that allows for two-way synchronization between the two platforms. You might need to continue using a third-party tool like Sync2Cloud for this purpose. However you can double check with google if they have new feature about that.
Reference: See your Google Calendar in Outlook - Microsoft Support ( in new Outlook and classic Outlook as well)
We apologize if we are not able to meet your requirements; however, thank you for bringing this to our attention, we will surely raise you concerns to our Product Team and hopefully this can be included in the future updates. In the meantime, please feel free to post this in our Feedback community by visiting Outlook · Community (microsoft.com) as it is a community monitored by our Product team to help improve user experience with Outlook, via feedback given by our valuable customers. For other concerns, please do not hesitate to add you post in the Microsoft Community Team. Thank you for choosing Microsoft as your partner in business.SincerelyEben Ezer Tres | Microsoft Community Moderator