Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users accessing the Microsoft Teams desktop client from Citrix VDI 2 may experience service quality issues – RESOLVED

Announcements Arpan Das

25/04/2025 09:22:00 AM

NHSmail Reference: INC46509050

Microsoft Reference: TM1035246

Issue Status: RESOLVED

Issue Description: Users accessing the Microsoft Teams desktop client from Citrix VDI 2 may experience service quality issues.

More info: Users may experience overall service functionality delays and quality issues with audio and video in the Microsoft Teams desktop client while using Citrix VDI 2 after the virtual machine wakes from hibernation.

Final Update: 15/05/2025 08:46:00 AM – Microsoft have confirmed that the fix has been fully deployed, and impact has been remediated after a period of monitoring service health.

Scope of impact: Impact is specific to users served through the affected infrastructure, attempting to utilize the Microsoft Teams desktop client using Citrix VDI 2 after the virtual machine wakes from hibernation.

Root cause: A code issue present in a SlimCore version utilized by Citrix VDI 2 disrupts transport optimization when using the Microsoft Teams desktop client after the virtual machine wakes from hibernation, resulting in impact.

Next Steps: Microsoft are reviewing their update procedures to better identify similar issues during their development and testing cycle