Quick assist service is down?

Hello,

I can confirm that Quick Assist relies on Microsoft’s Remote Assistance Service over HTTPS/TCP 443, so a widespread failure can be caused by the Microsoft service rather than the local Quick Assist installation. Microsoft’s current documentation does not publish a fixed ETA for restoring the service when there is an active backend incident.

I also found recent Microsoft Q&A reports from July 2026 describing the same error, “Quick Assist service isn't working right now. Please try again later,” affecting remote-support sessions. However, I could not find an official Microsoft incident notice confirming an active Quick Assist outage or providing an ETA as of today, September 17, 2026.

For a Service Desk environment, I would therefore not recommend repeatedly reinstalling Quick Assist unless the problem is isolated to specific devices. First verify whether the issue occurs across multiple support agents and networks. Also ensure outbound HTTPS access to https://remoteassistance.support.services.microsoft.com is permitted, as this is the primary Microsoft endpoint used by Quick Assist.

If the same failure is occurring for multiple agents/users across different networks, this should be treated as a potential Microsoft-side service issue and monitored through the Microsoft 365/Windows service health channels. Microsoft would need to provide the actual incident status and restoration ETA.

I hope you've found something useful here. If it helps you get more insight into the issue, it's appreciated to accept the answer. Should you have more questions, feel free to leave a message. Have a nice day!

Domic Vo.