This information is not kept anywhere in NBU logs for this long.
The default restore log on the server and clients is 3 days (Days_To_Keep_Logs or Host Properties, Clients, Client Settings 'Keep status of user-directed backup, archives and restores')
bprd on Master server logs all restores.
If bprd log is enabled on the Master Server, retention of this log is determined by Master server Clean-up properties in the 'Keep logs' field. Default is 28 days.
If you are backing up NBU logs on a daily basis with l-o-n-g retention periods, you may restore these logs to alternate location and manually check restored logs for restore requests.
