Using New Outlook on Windows for professional communication and productivity
You can find the ICS in Settings > Calendar > Shared Calendar.
For the Teams meeting issue, are you missing the Teams toggle?
If yes, can you please check the requirements below:
To see the Teams meeting toggle in new Outlook, your computer must meet the following requirements:
- You must be signed in to both Outlook and Teams with the same work or school account.
- You must use the new Teams client.
If your computer meets these requirements but you don't see the Teams meeting toggle, use the following steps to force the Teams and Outlook integration:
- Close Outlook.
- Right-click the Teams icon in the toolbar and select Quit Teams.
- Start Teams and sign in.
- Start Outlook.
Ref: https://support.microsoft.com/en-us/outlook/teams-meeting-add-in-missing-in-new-outlook