I've recently set up 365 Business Basic using an email address from my own domain, using first and last name[at]domain name, which is working fine. However when I send an invitation from Teams, they're being sent from a bizarre email address, MyComanyName[at]domain name, which I've never set up.
I verified the domain name with a TXT record, which was verified ok, but I've no idea where this email address came from or how to change it for Teams invitations. Outlook invitations go out using the correct email address. Any help much appreciated!
Do you mean scheduling a channel meeting? If so, the invitation will come from the group/team's emailaddress and will look something like email@example.com or firstname.lastname@example.org. You should be able to change that by updating the primary SMTP address of the underlying Office 365 Group, but I'd recommend sticking to Outlook for scheduling meetings.