Is it possible to copy Outlook Calendar entries into a Teams calendar?

Chris Cooper I tried this just today and IT FINALLY WORKED! Hence sharing here.

My problem was even more complex; I configured my Yahoo mail in desktop Outlook 365 and wanted to be able to have a Yahoo account calendar entry (which was created in desktop Outlook after accepting an email calendar invite) to MS Teams. Note that my desktop Outlook does not show the MS Teams add-in for some reason, otherwise things may have been simpler. OK now, when I go to Outlook on web, the calendar does not have this entry, because the Outlook Web only shows the calendar for the MS account (mine is mailto:xxxxxxxx@Outlook.com). So what I did was to just open the Yahoo calendar entry in my desktop Outlook, and saved it as an .ics file on my PC. Then I went to my Outlook web calendar, clicked Add Calendar, chose option to Add from a File, which opened a window asking to upload an .ics file, which I pointed towards the .ics calendar entry saved on my PC. After clicking OK, now this Yahoo calendar entry from my Outlook 365 desktop calendar now started showing in my Outlook web calendar. Note that if your Outlook web calendar already has this calendar entry, then you do not need the steps described until here. NOW, you just need to double-click to open the particular calendar entry which you would like to move to MS Teams, in your Outlook web calendar. Once the window is open, COPY the web address (long string) in your web browser address bar, go to MS Teams, Click on the Plus sign, choose Add Website, Paste the copied address, and Lo & Behold, the fully functional calendar entry would now start to show up in your MS Teams 🙂 I hope this resolves your issue. During research on the web, I saw some people mentioning that the web address for the Whole Calendar in Outlook web can be copied and pasted into MS Teams, but so far I just could not find how to do that. 

Cheers!