I'm not sure why the group appears in Stride, you could reach out to Support for help. https://support.atlassian.com/stride/
When you say, 'group', do you mean room or group of people?
There is no way to delete rooms in Stride; you can only archive them.
All good things come to an end - thanks to all our customers and partners who have been along the Hipchat and Stride journey with us. As of Feb 15th 2019, Hipchat Cloud and Stride have reached ...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event