Tag: Inactive Distribution Lists

The new Get-MessageTraceV2 cmdlet can fetch 90 days of message trace data, which means that we can check for inactive distribution lists using data for the last 90 days instead of being constrained to the last 10 days. Distribution lists are still important to Exchange Online and Microsoft 365, and it’s good to know which distribution lists are in active use (and how much traffic they get) and which are not. All done with PowerShell.

A recent correspondent asked how to find inactive distribution lists in Exchange Online. We didn’t have a good answer in the book, so here’s some PowerShell code to do the trick.