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Users of classic Citrix HDX/WebRTC optimization are currently seeing a prominent message in Microsoft Teams:
“Teams optimization for your virtual desktop will soon be unsupported.”
The problem:
There apparently is no documented way to suppress this warning administratively at present.
The result is predictable:
👉 Users see the message.
👉 Users contact the help desk.
👉 Yet immediate action is not required everywhere.
Microsoft distinguishes between endpoint platforms for the end of support:
🪟 Windows endpoints
The previous WebRTC-based optimization reaches end of support on October 1, 2026. Here, the direction is towards SlimCore.
🐧 Linux thin clients such as IGEL
are explicitly exempt from this date. The existing optimization remains supported until the corresponding new VDI optimization is available for Linux.
This creates an interesting situation in mixed environments:
Windows → SlimCore
IGEL/Linux → existing optimization continues
Community reports now suggest that Microsoft is aware of the warning issue and is allegedly working on a way to suppress it.
However, this is not yet officially documented.
For me, this is another example of a technically correct warning not necessarily producing a good user experience. 😉
Anyone running Windows alongside IGEL/Linux should therefore not overturn their entire Teams VDI strategy based solely on this popup.
