Outlook Reminder window has become much smaller

I had the same issue, and found that it reverts back to regular size if I go to the calendar page, then close outlook, then reopen. Somehow this resets the reminder box to normal size.

I tried this because a few months ago I had an issue with Outlook all the sudden making my font extremely tiny. One of the forums suggested going to the calendar, then closing outlook, then reopening and font reverts back to regular size (which works!). I still get this bug occasionally too, but until Microsoft fixes these ridiculous issues, at least going to Calendar, closing, opening seems to somehow refresh outlook. Hope that helps!

Some significant issues appear to be introduced in a recent update. I say update because I noticed the change immediately when it happened, and it was during a regular day when it was fine at the start of the day, Outlook was booted in the morning and changed while Outlook was booted (same session all day).

Checked - Version 2407 Build 17830.20138 Click-To-Run

Many people are reporting (sharing screenshots of) the same issue. Per my previous reply, I also see other UI and functional problems. Most recently, intermittently the Dismiss button disappears and does not reappear until Outlook (or Windows) is rebooted.

The troubleshooting steps in the replies assume there is something incorrectly 'written' to the user's instance of Outlook. There are many posts about this issue, and many people reporting it. It seems to be a change in the design of the dialog pushed by an update.

adding "notify" feature here

did not work either

What an asinine thread. This is NOT an "end user" issue at all. It is another DESIGN PROBLEM by micro$$oft. The Outlook reminder DIALOG BOX is not coded to allow the user to drag the edge to increase the size! Why the @#$% does everyone just tolerate micro$$oft's lazy unsympathetic attitude toward end users? Where is the outrage?