1. Your company wants the internal and external DNS zones to use the same domain name. What should you configure?
Active Directory–integrated DNS
Primary and secondary DNS zones
Split brain DNS
✔ Correct: Split brain DNS
Split DNS allows internal and external DNS zones to share the same name but return different IP addresses based on location.
2. Microsoft 365 recommends which DNS record to verify domain ownership?
MX
TXT
SRV
✔ Correct: TXT
TXT records are recommended because they do not affect mail flow and safely prove domain ownership.
3. Outlook clients use which DNS record to locate Exchange Online automatically?
MX
CNAME (Autodiscover)
TXT
✔ Correct: CNAME
The Autodiscover CNAME allows Outlook to find and configure Exchange Online automatically.
4. Which DNS record controls where incoming email for a domain is delivered?
SPF
CNAME
MX
✔ Correct: MX
MX records tell other mail systems which mail server receives email for the domain.
5. Which DNS record helps prevent email spoofing and phishing?
SPF (TXT)
SRV
A record
✔ Correct: SPF
SPF identifies authorized mail servers and helps prevent spoofed emails.
6. What is the maximum number of domains supported in a Microsoft 365 tenant?
100
500
900
✔ Correct: 900
Microsoft 365 supports up to 900 custom domains per tenant.
7. You want to add fabrikam.com and content.fabrikam.com. What is the correct order?
Add subdomain first
Add root domain first
Order does not matter
✔ Correct: Add root domain first
Microsoft 365 requires the root domain before any subdomains.