Hopefully the following should work for you:
Create a new "Historical - Interface Traffic" Report
Select fields, including Historical Interface Traffic > Transmit+Receive Data Combined > Circuit Utilisation (Max of Recv,Xmit) and change the function to MAX
Create a new simple filter on the above field and change the condition to be "is greater than or equal to" and then 80 as the value
Change the Time Period to Yesterday
Consider sceduling a report for early in the morning to email you the data for the previous day automatically
Hopefully, Bob is your mother's brother!
Sorry, quick edit...
Change the Time Period to Last Month, and schedule the report to be run early on the 1st day of each month in the Report Scheduler if you want to get the report sent to you on an automated basis.
This is awesome! thanks!
Agree.. very nice !! Thanks !