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Describe Microsoft 365 apps and services →hardMultiple ChoiceObjective-mapped

MS-900 Describe Microsoft 365 apps and services Practice Question

This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Exhibit

{
  "policy": {
    "name": "Block External Sharing",
    "type": "SharePoint Online Sharing Policy",
    "sharingCapability": "Disabled",
    "allowExternalSharing": false,
    "externalUserExpirationInDays": 30
  }
}

Refer to the exhibit. A SharePoint admin is reviewing a policy JSON snippet. Which statement accurately describes the effect of this policy?

Question 1hardmultiple choice
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Exhibit

{
  "policy": {
    "name": "Block External Sharing",
    "type": "SharePoint Online Sharing Policy",
    "sharingCapability": "Disabled",
    "allowExternalSharing": false,
    "externalUserExpirationInDays": 30
  }
}

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

External sharing is completely disabled.

The policy JSON snippet sets the 'sharingCapability' to 'Disabled', which completely disables external sharing for the SharePoint environment. This means no external users can be invited, and any existing external sharing links will cease to function. The 'expirationTime' value of 30 days is irrelevant because sharing is disabled entirely.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    External sharing is allowed only for existing guests who expire in 30 days.

    Why it's wrong here

    External sharing is disabled, so no guests can be added.

  • ✗

    External sharing is allowed but guests expire after 30 days.

    Why it's wrong here

    External sharing is disabled, not allowed.

  • ✗

    External sharing is allowed but only for users in the same tenant.

    Why it's wrong here

    External sharing is disabled entirely.

  • ✓

    External sharing is completely disabled.

    Why this is correct

    The policy sets sharingCapability to Disabled and allowExternalSharing to false.

    Related concept

    Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates see the 'expirationTime' of 30 days and assume external sharing is allowed with an expiration, but they overlook that the 'sharingCapability' is set to 'Disabled', which nullifies any expiration settings.

Detailed technical explanation

How to think about this question

In SharePoint Online, the 'sharingCapability' property controls the level of external sharing allowed, with values like 'ExternalUserAndGuestSharing', 'ExistingExternalUserSharing', or 'Disabled'. When set to 'Disabled', the tenant-level or site-level external sharing is turned off, and any 'expirationTime' or other guest-related settings become moot because no external users can be added. This is enforced via the SharePoint Online admin center or PowerShell using the Set-SPOSite cmdlet, and it overrides any user-level sharing permissions.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this MS-900 question test?

Describe Microsoft 365 apps and services — This question tests Describe Microsoft 365 apps and services — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: External sharing is completely disabled. — The policy JSON snippet sets the 'sharingCapability' to 'Disabled', which completely disables external sharing for the SharePoint environment. This means no external users can be invited, and any existing external sharing links will cease to function. The 'expirationTime' value of 30 days is irrelevant because sharing is disabled entirely.

What should I do if I get this MS-900 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 2026

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