HOTSPOT
A company plans to deploy an Office 365 tenant.
You have the following requirements:
• Administrators must be able to access the Office 365 admin center.
• Microsoft Exchange Online must be used as a Simple Mail Transfer Protocol (SMTP) relay for
a line-of-business application that sends email messages to remote domains.
• All users must be able to use the audio and video capabilities in Microsoft Lync 2013.
You need to configure the ports for the firewall.
Which port should you use for each application?
Select the correct answer from each list in the answer area.
Answer: 
Explanation:
Isn’t SMTP on port 25?
More info http://blog.mailgun.com/25-465-587-what-port-should-i-use/
SMTP port 25 is used for normal mail traffic, however Office 365 uses TCP 587 to relay (i.e. proxy) mail.
The reason is Port 587 is because valid users authenticating for office 365 only allowed to relay mail to any valid address on that port only.
TCP 587 Simple Mail Transfer Protocol (SMTP) relay
http://technet.microsoft.com/en-us/library/hh852522.aspx
the answer is not correct. For SMTP Replay Port Should be 25 or 587(But some applications cannot support 587). So the answer is port 25
please refer the below link
http://technet.microsoft.com/library/dn554323.aspx
Andy speaks truth – The article states that port 25 would be used in the “SMTP Relay” method.
Port 587 is recommended in the “Client SMTP submission” method.
The question specifies that you are setting up an SMTP Relay
Actually… could be wrong on this –
http://www.configureoffice365.com/configure-office-365-smtp-relay/
http://technet.microsoft.com/en-us/library/hh852522.aspx
I not sure, I deployed O365 for exchange online here and I di not remember of creating any rule for smtp on port 587 and everything is working without issue on port 25, but reading the documentation and related to Microsft exams, we must have more care about that.
based on this link, I think the port 25 is correct in this case. http://technet.microsoft.com/en-us/library/dn554323(v=exchg.150).aspx
Same, I deployed EO for client last month and didnt setup 587….. it seems the documentation conflicts…
I’m inclinded to go with 587 though because the article http://technet.microsoft.com/library/dn554323.aspx was last updated in July and the article http://technet.microsoft.com/en-us/library/hh852522.aspx was updated this month :/
Its a tricky one
Actually just noticed this…. on the article you referenced it states this – Client SMTP Submission Client SMTP submission allows your device or LOB application to send emails using an email address associated with an Office 365 mailbox by authenticating itself using that account. Each device can have their own sender address or all devices can use one address such as [email protected].
So it must be 587 is correct because thats exactly the requires defined in the question
http://technet.microsoft.com/en-us/library/hh852479.aspx
587
Answer:
TCP 25
TCP443
RTP/UDP 50020-50039
RTP/UDP 50000-50019
SMTP Relay with Exchange Online requires TCP port 587 and requires TLS.
I’m going to roll the dice on this and say it’s the following:
SMTP Relay: 587
Office 365 Admin: 443
Lync Outbound Video: 50020-50039
Lync Outbound Audio: 50000-50019
The only point of question is the SMTP Relay. In this article that has been posted a couple of times it’s clear that the SMTP Client Submission is the preferred method. What’s challenging about this question is that the SMTP Client Submission method can use the preferred port of 587 or the old standby of 25. Having taken well over 40 Microsoft Exams during my career, they tend to have you use the preferred newer methods over the old tried and true. Just the fact that port 587 is listed leads me to believe that’s the answer. There’s not enough information to tell us whether or not the LOB application will work with the SMTP client submission method, so I’ll assume it does and will pick 587 for better or worse.
https://msdn.microsoft.com/en-us/library/azure/dn383636.aspx#enablemfaoffice365
I am a nobody but my initial thought was TCP25 however looking at
https://support.office.com/en-us/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2?ui=en-US&rs=en-US&ad=US
do a CTRL+F and search for SMTP you will get the following : TCP 587 -smtp.office365.com
This exam is based on Microsoft official courseware. MOC says – port 587 – also, it is referenced here https://support.office.com/en-us/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2?ui=en-US&rs=en-US&ad=US <– this link is the link referenced in MOC as "additional reference". Excerpt from book below
Protocol Port Usage
TCP 443 Office 365 portal (admin and user), Outlook, OWA, SharePoint Online, Lync client, ADFS federation and proxy
TCP 25 Mail routing
TCP 587 SMTP relay
Following this official microsoft site is SMTP relay only possible on port 25
https://technet.microsoft.com/en-us/library/dn554323(v=exchg.150).aspx
TCP 25 Mail routing
TCP 587 SMTP relay
SMTP relay = 587