To which IIS virtual directory do the issues relate?

You have a Microsoft Exchange Server 2019 organization.

The help desk reports that it receives a high volume of calls relating to the following issues:

– Automatic replies are not being sent.

– Calendar sharing to external users is malfunctioning.

– Users who use Microsoft Outlook for Mac cannot access their mailbox.

You suspect that there is an issue with Internet Information Services (IIS).

To which IIS virtual directory do the issues relate?
A . Autodiscover
B . Rpc
C . EWS
D . Mapi