Here is an handy T-SQL script which gives information about your subscribed reports in SSRS.
USE ReportServer GO SELECT SJ.name AS JobName ,Cat.Name AS ReportName ,Sub.Description AS SubscriptionDescription ,Cat.Path AS ReportPath ,Sub.DeliveryExtension AS SubscriptionDeliveryType ,Sub.LastStatus ,Sub.EventType ,SJ.date_created AS SubscriptionCreatedDate ,SJ.date_modified AS SubscriptionModifiedDate FROM msdb.dbo.sysjobs SJ INNER JOIN ReportSchedule RS ON SJ.name=CAST(RS.ScheduleID AS VARCHAR(max)) INNER JOIN Subscriptions Sub ON Sub.SubscriptionID=RS.SubscriptionID INNER JOIN Catalog Cat ON Cat.ItemID=Sub.Report_OID