I have implement Nextdns for my LAN, unfortunately when I need remote support using Microsoft Quick Assist there is whitescreen so I cant generate code to help remote computer. When using broadband data there is no error so this is network related issue because I implement Nextdns so the suspect is DNS and after searching Nextdns log and compare Quick Assist Network requirement at:
https://docs.microsoft.com/en-us/windows/client-management/quick-assist
There is lot of domain that I should exception, because lot of domain have issue with privacy I wont make exception to all domain that requested. After several change i add execptio for domain:
js.monitor.azure.com
And run again Quick Assist then i can generate code and solving remote problematic computer using Microsoft Quick Assist.