Update 5/5/2021: For additional information on this subject and new settings, please see this post.
When a reply all mail storm happens in your organization, it can disrupt business continuity and ...
Updated May 05, 2021
Version 3.0
Blog Post
KevinShaughnessy
Microsoft
MicrosoftBrian Reid currently the thresholds and block duration are not customizable. We're exploring the possibility to make them customizable in the future. No promises nor guarantees at this time though.
Ed Woodrick love love love your suggestions! Noted! 🙂
HaydonG great suggestion for a "trusted user" list of sorts or at least except the admins or group owner. Thanks! While it's not the same exactly, note that anyone (like an admin) can still reply to, or forward, the thread so long as they reduce the overall recipient list to < the recipient threshold (currently 5000). Not exactly useful to educate everyone, but useful to forward the thread to the IT group or some such.
Sankarasubramanian Parameswaran - no the thresholds cannot be customized at this time; see comment to Brian above.
SopanWankhede I've touch on customization and exceptions above; about reports, as per the blog post it's something we know could be very useful to folks so we're looking into it, but no promises nor guarantees at this time.
More to come. . .