Additional calendar-related features and issues within Microsoft Teams for business
Hi, Rita. I am an independent advisor, trying to help other users in the Community with my experience in Microsoft products. Please note that I am a user like you and don't work directly for Microsoft.
I am sorry you are unable to locate Team Calendar. As a user, I understand how frustrating that can be. I deeply understand the issue has affected your work, rest assured I will try to provide you with a solution.
According to post created by Ankita in the article at https://answers.microsoft.com/en-us/msteams/forum/all/calendar-in-teams-side-app-bar-has-gone-missing/f59d6026-3f8a-409c-b03a-aa2a1abe92d7
"Generally in two situations, calendar is missing from Teams app list. One is if calendar is Unpin from Teams app list, it will remove from the Teams side app list. Second is, if calendar is not view from available App list, calendar is not added or removed from your account’s App set up policy. App set up policy are managed by Teams admin from Teams admin center. So given this all situation, suggest you to please check below information.
A. Check if calendar app is unpin:
Open your Teams desktop app and go to the more option button (…) > check if calendar is appeared or not. If you are able to see Calendar option, right click on it and click on “Pin” option.
B. If calendar is not visible in more options, please check your account’s App set up policy from Teams Admin center. For this you need to contact your organization’s Teams admin.
Login with global Admin account on Teams Admin center : Navigate to Users > search for your affected User account and open his account settings > go to Policies and check App Set up policy"
Under App set up policy : Navigate to Pinned apps > Check if Calendar is added or not > if its’ not added in the list, select (+) Add Apps tab to add Calendar .
Please visit the link above for Screenshots.
I hope this helps, let me know if this contradicts what you need. I remain helpful in answering any more of your questions.
Best Regards,
Femi.