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Microsoft Outlook app reviews: what users complain about

We ran Revunda on 300 of the most recent public App Store reviews of Microsoft Outlook (Email, by Microsoft Corporation) from 3 storefronts, dated 2026-08-13 to 2026-10-22. Average rating in this sample: 3.95★. Its all-time US App Store rating is 4.8★ from 9.3M ratings. 85 reviews contained a complaint; the biggest theme was bugs (67%).

Building a email app? 85 of these Microsoft Outlook reviews contained a complaint, led by bugs (67%). Get the same analysis of your own app: paste your App Store link at checkout and the PDF (complaint themes, severity, version trends, 10 ranked fixes) arrives within 24–48 h.
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Complaint categories

CategoryReviewsShare of complaintsAvg severity (0–3)
Bugs5767%2.2
Feature requests3440%1.9
UX / design2732%1.9
Crashes / freezes1012%2.6
Performance911%2.1
Pricing / subscription34%2.6
Ads34%2.1

A review can count in several categories, so shares add up to more than 100%. Severity is the AI's estimate of how bad the problem is for the user.

Top issues, ranked by reviews × severity

  1. Soften the redesign backlash: 16 complaining reviews, avg severity 2.0/3. What to do: Explain the change in-app, restore the most-missed option, or offer a setting for the old behaviour.
    “Is there an older version that is available. I can’t sync up my inbox folders alphabetically. I have no issues with the desktop version, the newer live version on the desktop is like the app. Disappointing!” (1★, v5.2640.0, US)
  2. Ship the most requested feature: 17 complaining reviews, avg severity 1.7/3. What to do: Read the quotes below for the exact request; consider a public roadmap.
    “Add the missing features that exist in the MAC OS. That would really make the IPAD a great alternative to the MacBooks. Many of us want to carry only one device.” (3★, v5.2640.0, US)
  3. Fix login / account access: 13 complaining reviews, avg severity 2.4/3. What to do: Audit the sign-in flow (SSO, password reset, verification emails) on the latest version; add clear error messages.
    “Don’t waste your time with Outlook mail, asks you to sign in constantly and the mysterious sign in code that is supposed to show on the app never does. Deleted this account from all but one of my devices” (1★, v5.2639.0, CA)
  4. Simplify navigation: 11 complaining reviews, avg severity 2.0/3. What to do: Run a quick usability test on the screens users mention; remove extra taps and pop-ups.
    “Mail is passable, but the Calendar app is an atrocious, confusing, unusable monstrosity. Do not recommend. I don’t know how corporations tolerate the lack of utility at the premium paid.” (1★, v5.2637.0, CA)
  5. Fix features broken by the latest update: 10 complaining reviews, avg severity 2.1/3. What to do: Add regression tests for the features users name in these reviews before the next release.
    “Please re-enable Vision Pro support” (1★, v5.2639.0, GB)
  6. Stop data / progress loss: 7 complaining reviews, avg severity 1.9/3. What to do: Reproduce sync and restore paths; add server-side backup and a visible "restore" option.
    “When i asked Google AI: "Do inbox adverts violate GDPR" It's response was! Yes, certain inbox advertisements can violate the GDPR. Specifically, if an advertisement is displayed in a user's email inbox in a way that resembles an email and is used for direct m…” (1★, v5.2635.0, GB)

Rating by app version (newest first)

VersionReviewsAvg starsShare with a complaint
5.2641.0724.218%
5.2640.0863.833%
5.2639.0293.924%
5.2638.0133.846%
5.2637.182.638%

Versions with fewer than 3 reviews in the sample are left out.

FAQ

What do users complain about most in Microsoft Outlook?

In 300 recent App Store reviews (2026-08-13 to 2026-10-22), the most common complaint theme was bugs (67% of complaining reviews), and the top specific issue was “soften the redesign backlash” (16 reviews).

How many Microsoft Outlook reviews are negative?

85 of 300 recent reviews (28%) contained a complaint. Average rating in this sample: 3.95★. Its all-time US App Store rating is 4.8★ from 9.3M ratings.

Can I get the same report for my own app?

Yes. Paste your App Store or Google Play link at revunda.xyz/apps/ and you get the full PDF (up to 300 recent reviews, 7 categories, 18 specific issues, version trend, 10 ranked fixes) within 24–48 hours. A free mini check shows the top 3 themes in seconds.

How to read this

Apple's public feed only shows recent reviews, so this is a snapshot of the last weeks or months, not the app's full history. Popular apps attract complaints in proportion to their size; the useful part is which issues repeat. Generated 22 October 2026. We have no relationship with Microsoft Corporation.

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Want this for your own app? Paste your App Store link and get the full PDF (up to 300 recent reviews from up to 15 storefronts, 7 categories, 18 specific issues, version trends, 10 ranked fixes) within 24–48 h.
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