Symptoms
In Microsoft Skype for Business Server 2019 or Skype for Business Server 2015, you configure an instant messaging (IM) filter to prevent an end-user from sending an IM message that contains a network path, for example, \\server. The IM filter doesn’t work as expected and the link is still clickable.
Resolution
To fix this issue, install one of the following updates:
-
The September 2020 cumulative update 7.0.2046.244 for Skype for Business Server 2019, Front End Server and Edge Server.
-
The May 2020 cumulative update 6.0.9319.580 for Skype for Business Server 2015, Front End Server and Edge Server.
To enable this fix, you also need to set the -IgnoreLocal parameter to False by running the Set-CsImFilterConfiguration cmdlet and then restart the service.