Outlook app crashing when ‘Organize by Thread’ is disabled on iOS

Outlook is a web-based email service from Microsoft that allows users to send and receive email messages, manage calendars, and store their contacts’ information.

Microsoft also recently rolled out a new version of Outlook for Windows to all of its Office testers.

While this is certainly quite exciting, Microsoft has yet to address an issue that is currently worrying iOS users.

Outlook app crashes when “Organize by thread” is disabled

Many are reporting an issue where the Outlook app on iOS keeps showing emails in threads even when the “Organize by thread” setting is turned off.

Outlook app organizing emails in thread

@Outlook Why are emails still organized by thread even though this setting is disabled in iOS 16? Turn it on and then off and things are fixed, but just restarting the app. Very annoying!

Outlook cannot be opened. I get the error message cannot be opened, the ost file cannot be accessed. You must connect to Microsoft Exchange at least once before you can use the Outlook data file. My email account has been set up in Outlook for some time. I can easily access Outlook.com, send and receive email.

The app reportedly crashes when users try to switch from the feature that organizes messages as conversation threads by the email subject.

Outlook on my iPhone and iPad kept crashing within a few seconds of opening it.

According to reports, this problem appeared after the latest v4.2238.1 update.

Affected users have tried uninstalling and reinstalling the app but to no avail. Even clearing the cache in Safari and restarting the iOS device doesn’t seem to fix the issue.

Official Recognition

Fortunately, Microsoft has recognized the issue where the Outlook app crashes when the “Organize by Thread” setting is disabled.


There are also no possible workarounds that can temporarily fix the problem.

We hope the team will find a solution soon to allow users to access their Outlook accounts.

We’ll keep a close eye on further developments and update the article if anything of note emerges.

note: We have more stories like this in our dedicated Microsoft section, so follow them too.

PiunikaWeb started out as a purely investigative tech journalism website with a focus on “breaking” or “exclusive” news. In no time, our stories were picked up by Forbes, Foxnews, Gizmodo, TechCrunch, Engadget, The Verge, Macrumors, and many more. Would you like to know more about us? Go here.