New meetings ending 5/10 minutes early in Outlook - How to get back to normal duration meetings.
In Outlook, go to the File menu and choose Options, then in Options choose calendar on the left menu.
To set the highlighted fields to zero minutes, you will find if you try to click on zero minutes it doesn’t do anything. To get around this, choose a different duration that isn’t zero for each first, then you can change it to zero afterwards.
Click OK to complete.