This feature request is working its way through the backlog queue. No new details are available yet.
Due to prioritization of other work-items this has been moved to the backlog. We will update when it is being actively worked on again.
We are still considering this feature for future releases, and will continue to update the status when it changes.
We know many of you are waiting for a Teams client for Linux, and we’re pleased to confirm we’re actively working on it. Stay tuned for more information.
This is in the works! Fill out this survey if you want to influence the feature: https://microsoft.qualtrics.com/jfe/form/SV_esTxHdABLQxKLvn
Thanks to everyone who volunteered for testing the Office 365 group calendar. The TAP team will be reaching out as we are closer to being ready.
~AlexEric McIntyre commented
Rather than in the left nav, I would like to see the ability to add arbitrary shared calendars as a tab in a channel.