When utilizing Microsoft Teams optimization through Citrix Workspace, Teams is unable to access the built-in microphone, despite other applications detecting it without issues

Possible Solutions:

1. Upgrade to Citrix Workspace 2103.1 or a later version, as this may resolve the issue.

2. If upgrading is not feasible or does not fix the problem, create the following registry key on the client PC:

   • Location: Computer\HKEY_CURRENT_USER\Software\Citrix\HDXMediaStream
   • Key: DisableADM2
   • Type: REG_DWORD
   • Value: 1

Ensure that you restart the client machine to apply the registry key changes correctly.

Then, start an ICA session and verify if Microsoft Teams functions as expected.

Note: Make sure webrpc.dll and wertc_codecs.dll are unblocked. To do this, right-click on the exe file, select 'Properties', and choose the 'Unblock' option if available.

Problem Cause

The HP driver is unable to be set to two-channel audio, which is required for the Teams optimization feature to function properly.