Inactive Lists By Distribution List report shows zero for the member count for each DL (4237581)

When you run the Distribution Lists | Inactive Lists | By Distribution List report, the Member Count value for each Distribution List returned shows zero.

Confirm MessageStats is configured to gather Distribution List Membership information:

1. Open the MessageStats console
2. Expand Exchange Organizations
3. Right click your Organization name and select Properties
4. Select the Distribution List Membership tab
5. Verify there is a check next to Gather membership information when gathering distribution lists

Ensure the Organization name is populated in the Filters section of the report before you click Apply Filters and generate the report

Note: If a DL has been deleted it will report 0 members.