Default notification for lists and library's hitting the 5000 items limit
At the moment there is no option to send a notification to an Office 365 Admin when a list or library is reaching the limit of 5000 items, it would be good if an out of the box option could be implemented to send this notification. e.g., a check-box option with an email field and the number of items to alert when reached, this would be great if it could be implemented across all site collections, so an Admin could set this up once and not worry about time consuming tasks of having to set up alerts or workflows to try and counteract this limit.
Setup some sort of email alert for the entire system to alert administrators when close to the threshold limit so we are aware of this before its too late
Dave Bruhn commented
I would second this. The alerting functionality within Office 365 as a whole is largely ineffective.