On PC installed Microsoft Office 365. We logged into the Outlook account 365 with a Microsoft account, the main mailbox is used by another one connected via IMAP. Meetings are created via Teams add-in in Outlook. Teams meetings will be connected via a Microsoft account, but it is important to send invitations through main mailbox. Faced with such a problem that when sending an invitation to a Teams meeting to external users, the field with the text and a link to go to the meeting does not reach them, although the invitation itself comes and is added to the calendar. Can someone suggest whether this functionality is not provided, or something is blocking the sending of this field with text?