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Microsoft MS-721 Exam - Topic 1 Question 54 Discussion

You are planning a Microsoft Teams Phone deployment. That will use Direct Routing. You need to allow traffic from Microsoft 365 to a Session Border Controller (SBC). Which IP address ranges should you allow through the firewall?
A) 52.112.0.0/14 and 52.120.0.0/14
B) 10.10.0.0/24 and 10.11.0.0/24
C) 8.8.8.8/32 and 4422/32
D) 132.245.0.0/16and40.104.0.0/15

Microsoft MS-721 Exam - Topic 1 Question 54 Discussion

Actual exam question for Microsoft's MS-721 exam
Question #: 54
Topic #: 1
[All MS-721 Questions]

You are planning a Microsoft Teams Phone deployment. That will use Direct Routing. You need to allow traffic from Microsoft 365 to a Session Border Controller (SBC). Which IP address ranges should you allow through the firewall?

Show Suggested Answer Hide Answer
Suggested Answer: A

by Carry at Apr 01, 2026, 05:05 AM

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Delmy
2 months ago
B seems too local. Not suitable for Microsoft 365 traffic.
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Ettie
2 months ago
Agreed! A makes sense for Direct Routing.
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Deonna
2 months ago
I think A is the right choice. Those IP ranges are for Microsoft services.
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Jeannetta
2 months ago
I thought it was D) at first, but A) makes more sense.
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Evette
2 months ago
B) is just local IPs, not for external traffic.
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Kiley
2 months ago
Wait, are we sure about that? Seems too specific.
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Lucy
4 months ago
I agree, those are the right ranges for Microsoft 365.
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Xenia
4 months ago
Definitely A) 52.112.0.0/14 and 52.120.0.0/14!
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Tomoko
5 months ago
I feel like I’ve seen those ranges in documentation before. A sounds familiar, but I need to double-check.
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Alison
5 months ago
I’m a bit confused; I thought Direct Routing used different IPs. Could it be D instead?
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Cecilia
5 months ago
I remember practicing a similar question, and I think it was about allowing traffic from Microsoft services. A seems to fit that context.
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Lezlie
5 months ago
I think the answer might be A, but I’m not completely sure about those specific IP ranges.
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