Use Outlook to invite people to an online meeting. This works not only for district accounts but for community members, also.
Conference Call from an Android Phone.pdf
If a person cannot use a computer to access Teams, this may be a solution where multiple people can use their cell phone to hear and contribute.
Guardians How To Access Teams.pdf
This is a document that can be sent to people who are outside the WD community so they can attend a Teams Meeing.