A company uses Exchange Online.
A user receives a non-delivery report when sending emails to external recipients. You perform a message trace and discover that emails are not being sent from the Exchange environment.
You need to identify the component that is causing the issue.
Which component is causing the issue?

A company uses Exchange Online.
A user named User1 schedules a meeting with a conference room mailbox named Conf1. Conf1 is already reserved for another meeting but does not automatically decline the conflicting meeting request.
You need to ensure that conflicting meeting requests sent to Conf1 are declined. What should you do?

A company uses Exchange Online. The company configures a transport rule that applies a disclaimer to all emails from the Internet.
Users receive calendar sharing invitations from external senders. Users report that they are unable to open the calendar from a sharing invitation in Outlook on the web.
You need to resolve the issue.
What should you do?

A company uses Exchange Online. The company configures a room mailbox named Room1 to use resource delegates.
Resource delegates report that they are not able to approve meeting requests for Room1.
You need to ensure that resource delegates receive meeting request emails.
How should you complete the command? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

You need to resolve the retention issue reported by members of the compliance team. What should you configure? To answer, select the appropriate options in the answer area.
NOTE: Each correct answer is worth one point.