Description of Reported Problem

Outlook records Journal entries in whole units i.e. minutes. 

Please see the screen shot  of the Journal View in Outlook below:

Also see the following Journal entry screen shot.

By default Outlook records in whole units not including seconds, and rounds down to the last minute. So if a call was 30 seconds it will show as 0 minutes. 

Solution

Summary

There is currently no workaround for this behaviour in Outlook.