How do I filter search results to only include unread messages in Office 365 outlook.com? I've tried read:no, but that looks for messages containing read and no.

Office 365 Outlook Search

5 Answers 5


I was also struggling to get all the unread emails (including from the subfolders) in Outlook Office 365. The closest I could find was the following search query:


Search Email

In case of Desktop client, this can be achieved with the Search Folders.

Search Folders -> Right Click -> New Search Folders -> Unread Mail

But, unfortunately this feature is not available yet for the Office 365. Here is the uservoice link for this search folders:

UserVoice - Outlook Office 365 Search Folders

  • isread:no search is available in web outlook, "unread search folder" is not Commented Jul 27, 2020 at 18:27
  • Not a good sign, that link is broken and MS is moving away from UserVoice. Now just 'submit your feedback' to a blackhole help icon. windowscentral.com/… Commented Sep 15, 2021 at 4:10

At the top of the interface for a folder (e.g., Inbox), next to the folder name, there's a pull menu called Filter. Pull that down and select Unread.


There is an easy way to solve this issue. I created an unread mail folder in the NEW desktop version and added it to favorites; it automatically synced to outlook.com (This is a business/paid account). This function may not work under free Outlook accounts.

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Please take a look on the screenshot below where "filter" is circled on the right. We have to simply filter with "Unread".

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  • This query is for unread accross all folders, not folder specific.
    – Mox
    Commented Feb 3, 2022 at 15:00

While you can filter for Unread messages in any folder, that search does not seem to include subfolders at all. Since the SearchFolders feature isn't yet available in the Outlook Web App, there is no way to store the filter/search you have to now manually perform everytime.

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