The DFS health set is listed as "Unhealthy" in an Exchange Server 2016 environment

Applies to: Exchange Server 2016 Enterprise EditionExchange Server 2016 Standard Edition


In an Exchange Server 2016 environment, the Distributed File System (DFS) health set is listed as Unhealthy, even when the DFS service is not using the server.

For example, the health set may be listed as follows.



This issue occurs because the DFS probe is enabled if the server is a Domain Controller or the server name begins with "DC" characters.

Cumulative update information

For Exchange Server 2016

To resolve this issue, install Cumulative Update 3 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Learn about the terminology that Microsoft uses to describe software updates.