Under a Windows Server 2012 R2, I see less than 2 days of Task Scheduler logs ! To be honest that's already 17'295 entries, maybe is it the maximum capacity ?
Therefore my question : is the problem due to display options, or is the server keeping so little logs ? In the second case, how to extend logging capacities ?
To view the logs I go to Event viewer > Apps and services > Microsoft > Windows > Task Scheduler > Operational
Any help would be appreciated.
P. S. I found an older discussion which doesn't seem to apply for Windows Server 2012 R2 : Extending the Windows Task Scheduler log file
Woaw, I found the solution myself :
I will validate this answer if the solution works.