Exam MS-100 topic 2 question 50 discussion

Actual exam question from Microsoft's MS-100

Question #: 50
Topic #: 2

HOTSPOT -
Your company has a Microsoft 365 subscription that contains the following domains:

Contoso.onmicrosoft.com -

Contoso.com -
You plan to add the following domains to Microsoft 365 and to use them with Exchange Online:
✑ Sub1.contoso.onmicrosoft.com
✑ Sub2.contoso.com
✑ Fabrikam.com
You need to identify the minimum number of DNS records that must be added for Exchange Online to receive inbound email messages for the three domains.
How many DNS records should you add? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:

Show Suggested Answer

Suggested Answer:

Box 1: 2 -
You don't need to verify Sub1.contoso.onmicrosoft.com because the onmicrosoft.com domain and DNS is managed by Microsoft. You also don't need to configure an MX record for Sub1.contoso.onmicrosoft.com because that will be done by Microsoft.
For sub2.contoso.com, you don't need to verify the domain because you have already verified its parent domain contoso.com. However, you do need an MX record to direct email for that domain to Exchange Online.
For Fabrikam.com, you will need to verify the domain. You will need an MX record to direct email for that domain to Exchange Online.

Box 2: 0 -
You 'should' create CNAME records for autodiscover to point your email clients to Exchange Online to connect to the mailboxes. However, you don't have to. You could configure the email client manually. Therefore, the minimum number of CNAME records required is zero.

by prepre at April 6, 2021, 2:41 a.m.

Comments

Submit Cancel

prepre

Highly Voted 4 years, 3 months ago

what lmao, I get the technicality but what lmao

upvoted 22 times

proxyma93

2 years, 1 month ago

This is why I'm practising exam questions...

upvoted 1 times

...

monsterjuice

Highly Voted 4 years ago

The question on the exam looks like it does here-https://www.exam4training.com/how-many-dns-records-should-you-add-2/ Here they are missing that Contoso.com has already been added. That's why the answer talks about it already being verified.

upvoted 6 times

venwaik

3 years, 11 months ago

"You plan to add the following domains" which says that contoso.com and fabrikam are not added beforehand. therefore we need to add 2 MX records for both domains. If the subscription had the contoso domain included, it doesn't say you already added the mx record. Either way, you need to add 2 MX records

upvoted 2 times

...

Wearsy

Most Recent 4 years, 1 month ago

So you've got to guess whether contoso.com already has the mx records added, seeing as though it's already in the tenant...

upvoted 2 times

Wearsy

4 years, 1 month ago

Could be interpreted in both ways but the given answer seems to be asking you to confirm how many MX records you need to have manually in place for the 3 domains, which the answer is 2, so fair enough...

upvoted 1 times

...

wonap

4 years, 2 months ago

which one?

upvoted 1 times

prepre

4 years, 2 months ago

you don't need cname records for mail flow. that's needed for outlook autodiscover. So technically it's 0 CNAME Records.

upvoted 9 times

melatocaroca

4 years ago

https://docs.microsoft.com/en-us/microsoft-365/admin/get-help-with-domains/create-dns-records-at-any-dns-hosting-provider?view=o365-worldwide

upvoted 1 times

...