Can MessageStats report on Hourly Mailbox Activity?
This is not currently available in MessageStats. Enhancement Request TF00064815 has been raised for this to be included in a future release of MessageStats
The reason for not collecting hourly counts at the mailbox level is volume. At the server level, MessageStats collects hourly activity values but that’s because organization will never have thousands of servers. When it comes to mailboxes, there are situations where we are seeing hundreds of thousands. Multiply that by 24 values a day and one obtains very large databases. New technologies are emerging that won’t have these limitations but for now, given the way MessageStats was designed we have limited granularity