Windows Defender Firewall Block Rule - Nov 2024

Known Issue

Date Logged	November 7th, 2024
Product(s)	Mimecast for Outlook,
Status	Not Fixing

Issue

We are aware of an issue in Mimecast for Outlook, relating to the Windows Defender Firewall Block Rule.
In rare scenarios, users may encounter the message: "A rule has been modified in the Windows Defender Firewall exception list."
The msddsk.exe process is blocked by rundll32.exe.

Workaround

• Create a Group Policy Object (GPO) entry, to allow msddsk.exe.

See Also…

• Mimecast for Outlook - Group Policy