Hello,
I'm new in the community.
I'm responsible for the development of in house solutions in belgium. And I'm evaluating JIRA Service Management. So, I just start with the free licence.
It was easy to configure a first project and the portal. Now, I try to send notification to join the portal. I give the e-mail adresses of our end users, a notification is sent but the link doesn't work. The portal displays the message "like expired"

I don't know what is my mistake, Is some one can help me?
Thanks in advance,
David