@mentions? ? Not working ..

[Josselyne Lugo]

I have been trying to use the @mentions for colleagues and it is not working for me. The only mentions that work are the ones from the thread. I Press @? and all the names from the people replying on the thread do show up but when i try to mention one of my colleagues it will not let me tag anyone. Is anybody else having this problem or am I doing something wrong? I am using a safari browser if that matters..