In UDP the activity log is seen only when we launch the agent console and see the 'View Logs'
If activity logs needs to be exported then follow the solution below
From command prompt go to the following location
C:\Program Files\CA\Arcserve Unified Data Protection \Engine \ Bin
Now type > cmdUtil.exe \db\dump\actlog (version 5 update 4
However version 6 onwards just type > cmdUtil.exe \db\dump
This will collect the Activity log for the respective Node in the ActLog folder
Like in screenshot below