Azure DevOps Board - using @ to mention users doesn't work

Question

When editing or creating a work item for Azure DevOps Board, you can use "@" character to mention specific users. For some of my group members (Basic level), typing "@" doesn't present any usernames. According to Basic level access, only limitation published is access to Azure DevOps Test Plans. We're not trying to use Test Plans but merely editing/creating work item in Board and mentioning users. Does anyone know how to fix this? See screenshot below to see the issue.

Answer 1

Hi Kang, Steve,
Thanks for the question and using MS Q&A platform.

Azure DevOps is currently not supported in the Microsoft Q&A platform; the supported products are listed over here https://docs.microsoft.com/en-us/answers/products (more to be added later on).

In order to assist best on your query, I would request you to post your query in SO => Azure Devops dedicated support. Additionally, adding the [Azure] tag on SO will increase visibility as it is a Microsoft Sponsored tag.

https://stackoverflow.com/questions/tagged/azure-devops

OR

Report any Azure DevOps problems on Developer Community.

This will assist you with a faster reply to your query.