Prerequisites to Block Reply to All Storms

Any ordinary Joe Schmo won’t be able to take action on this so we’ll need to recruit an exchange administrator or a Global Admin in Azure AD. Next we’ll need a few details like the subject we’re trying to stop. Frankly that’s about it so I’ll lay that out bullet style for easier visualizations.

• Exchange Administrator or Global Administrator
• Subject of the email you want to stop

How To Stop Reply All Email Chains Using Exchange Transport Rules

Let’s get to the meat and potatoes of how to quickly setup a rule to stop reply all email chains because let’s face it, it is annoying!! Again we’ll lay this out bullet style for easier visualization.

• Open Exchange Admin Center (EAC) -> Mail Flow -> Rules
• Click on the plus sign to create a new rule

• In the New Rule message box set the following
• Name: Stop Reply All Email Storm
• Apply this rule if.. The subject or body includes <your subject line>. Don’t forget to hit the + sign to add it!
• Click on the More options… link below the “Enforce” radio button
• Under Do the following… Set Block this message… delete this message without notifying anyone
• Click “Add Action” because we, the administrators, want to know if people are still replying
• Select Generate incident report and send it to…
• On the right side click “Select one..” link and find your name so the reports can go to you
• Underneath that click on “Include message properties” link and select all -> Ok
• Click Save

Testing The Exchange Transport Rule

Once we save the transport rule we’ll just need to sit back and wait until the next guy replies all with another useless message. Once they do, and we can almost guarantee they will, the incident report will be sent to you. Let’s look at what that looks like.

My email went to a single mailbox for testing purposes, but the concept is the same.

Since our transport rule specified to include the original message under the message properties, we can see the original email as an attachment to the incident report.

That’s all folks! Now you have the tools to stop the reply all storms that so many of us have experienced. If you like to see more Exchange content be sure to check out our Exchange Section as well as our Youtube Channel for those guys that prefer not to read.

The post How To Stop Reply All Email Chains appeared first on the Sysadmin Channel.