HOTSPOT
Your company has an Exchange Server 2013 organization named contoso.com.
All users run Microsoft Outlook 2010 or Outlook 2013.
The company recently acquired another company named
A.Datum Corporation. All of the users at A. Datum run Linux-based computers and use a third-party
IMAP client to access their email messages.
You configure IMAP over SSL to use the external URL of mail.contoso.com.
You need to publish the IMAP settings to Outlook Web App.
What command should you run? (To answer, select the appropriate options in the answer area,)
Answer: 
How this one is worded is confusing.
“You configure IMAP over SSL” – This makes it seems like it’s already configured which is done with the current answer “Set-IMAPSettings -ExternalConnectionSettings mail.contoso.com:993:SSL”
“You need to publish IMAP Settings to OWA” – This seems like the task you now need to complete which would be done with the “Set-ReceiveConnector -AdvertiseClientSettings $true” command.
By default, users can’t look up their POP3, IMAP4, and SMTP server settings through Outlook Web App. To allow your users to look up their POP3 and IMAP4 server settings through Outlook Web App, you need to use the Set-PopSettings and Set-ImapSettings cmdlets. To allow your users to look up their SMTP (outgoing) server settings, you must use the Set-ReceiveConnector cmdlet.
https://technet.microsoft.com/en-us/library/jj657728(v=exchg.150).aspx
AdvertiseClientSettings parameter specifies whether the >>>>>SMTP<<<< Options > Account > my Account > Settings for POP or IMAP access
● To advertise IMAP or POP settings, use Set-IMAPSettings or Set-POPSettings with
the –ExternalConnectionSettings parameter, which should include the FQDN of the
machine and the port number and encryption scheme.
● To advertise SMTP settings, use Set-ReceiveConnector
–AdvertiseClientSettings:$true –FQDN fqdn.
Microsoft Exchange Server 2013 Inside Out -Connectivity, Clients, and UM Connectivity, Clients, and UM (Page 216)