Calculating time spent on and creating reports of Meeting, Tasks and Journal items is quite a common request of people who plan and record everything in Outlook.
Sadly, the reporting features within Outlook are quite limited. While there is a duration field, Outlook cannot directly make calculations with that.
To make calculations within Outlook, you’ll need to create a custom macro. In this guide you’ll find the VBA-code needed to create such a macro. The macro calculates the total amount of time spent on the selected items and returns the answer in a message box.
If you need to create an actual report with more details, then you can make such reports with help of an export to Excel or by using a reporting add-in.
Continue reading: 3 Methods to report time spent on Meetings, Tasks and Journal items