Answers and explanations

1. B. Grant-CsTeamsUpgradePolicy and SfBWithTeamsCollab

Explanation: Grant-CsTeamsUpgradePolicy is used for Skype for Business Online users, while Set-CsTeamsUpgradePolicy is specifically for Skype for Business 2019 (on-premises) deployments. SfBWithTeamsCollab co-existence mode will allow users to continue using Skype for calls, meetings, and chats, but will allow channel collaboration in Teams.

Reference: https://docs.microsoft.com/en-us/powershell/module/skype/grant-csteamsupgradepolicy?view=skype-ps and https://docs.microsoft.com/en-us/microsoftteams/migration-interop-guidance-for-teams-with-skype#detailed-mode-descriptions

2. A. Yes, users from other companies are able to join our meetings.

Explanation: Based on the information given, we can assume that users from other organizations are able to join our meetings as the Meeting settings currently allow anonymous participants. We do not have information about blocked domains,...