Hi Phani,
Even i had this question but seems nothing related to the user information is captured in maintenance mode.
Definitely it should be added, if we have such information available then we can extend the maintenance mode rights to noc/dcops team. without this feature it is has a very high risk if someone put the entire environment in maintenance and we will not be able to track it.
I thought about using logmon to read maintenance_mode probe logs and trigger and alert/email whenever a new schedule is created. Then we can have at least some information when the maintenance schedule was created etc..
I suggest you to raise an Idea/enhancement request.
Regards
Hitesh Sehgal