apple store

For what device? For a Mac, you download direct from Microsoft. See: https://www.microsoft.com/en-us/microsoft-365/microsoft-teams/download-app

For an iPhone/iPad it is in the App Store; I found it by searching Microsoft Teams. It requires iOS 10 or later. You can have Microsoft send you a link by clicking "Download for mobile" in https://www.microsoft.com/en-us/microsoft-365/microsoft-teams/download-app

If there was another one it should be listed there. Sorry but I don't have any particular expertise in why it is not working. If someone else here doesn't help, you may want to contact Apple Support; there is a contact support link at the top right of this screen.

Thanks for answer , I have download the app, but I cannot use because it say that my username and password is not correct, but I have put the correct one, maybe the are two username and password in my Mac that I don’t know, how can I find out the correct one?

That is the Administrator user name and password on your Mac. You can see what users have been set up (and which is Administrator) by going to Apple menu > System Preferences > Users & Groups.

I have tried many time this user and password but it says is not correct , that’s why I wonder if there is another user that I don’t know

I have tried the correct user and password but it say not correct, that’s why I wonder if there is another one