Additional features, settings, or issues not covered by specific Microsoft Teams categories
Hi PaulFen,
As mentioned in the article below, all your contacts and groups that you created in Skype for Business will show up in Teams under your contact list. To access your contacts, simply click on “Chat” in the left navigation and then on “Contacts”. Here, you can also add new contacts or create new contact groups.
That means people in the contacts list are your Teams contacts and the list also contains Skype for business contacts.
To view the presence of your Teams contacts, you just need to switch to the Chat section in Teams > Contacts > hover over your people card then you can check the detailed information of your contacts
To view the presence of team members, go to Teams section > click More Options(...) button next to the team > Manage Team > Members
Best Regards,
Huni