Using @ in Issue comment field users are not provided a list of avail users to pick from.

[Lance Salter]

When Team members try to enter a comment on an Issue and use the @ in order to tag a specific user so they receive an email they do not receive a list of avail users. When I conduct the same step I am provided the list of avail users and I can select one, when complete the user is sent an email. I am a Jira Administrator, the rest are are in a User Group and all other permissions available to them.

[Sachin · Accepted solution]

Hello Lance,

Did you check if the user who is trying to mention another user have Browse Users global permission, which is required to browse (populate) users. If not then I would add the required group.

As jira admin
goto -->   --> System --> Global permissions --> Under Add permission --> Click on drop-down 'Permission' and select 'Browse Users' --> Select the group you want to give this permission in the drop-down next to group -->  Add.

You can also take a look at this troubleshooting KB from Atlassian. 

[Lance Salter]

This worked perfectly.