UserA works at CompanyA and UserB works at CompanyB. CompanyA configures Microsoft Teams to use Islands mode. CompanyB configures Teams to use TeamsOnly mode. UserA sends a Teams message to UserB.

UserB receives the message. The following notification displays:

UserB selects the Continue your conversation here link. The following message displays in the new chat window:

You need to provide a solution so that the two users can successfully communicate with each other.

What are two possible ways to achieve this goal? Each correct answer presents a complete solution.

NOTE: Each correct selection is worth one point.

A. Ask UserA to use Skype for Business to chat with UserB.

B. Ask UserA to change their coexistence mode to TeamsOnly.

C. Add UserB domain to the allowed list.

D. Ask UserB to sign out and sign in to Teams.

E. Ask UserB to use Skype for Business to chat with UserA.

Reference:
https://docs.microsoft.com/en-us/microsoftteams/teams-and-skypeforbusiness-coexistence-and-interoperability