Hi!
I've probably missed some permission setting..
Anyway, here's my problem (example):
I am a service desk agent and receive a ticket from customer A, which I'd like to share with customer B.
Therefore, I click on the share-button, specify customer B. Customer B receives a notification per mail, opens the link, which should take him to the issue. However, he gets redirected to the help center-landing page instead.
If I'm checking customber B's profile @ portal I'm not seeing any (shared) requests either.

What setting am I missing?
Here's a screenshot of the service desk project browse-permissions:

SD customers should have the ability to browse the project and its issues.
Any help appreciated, thanks!
Cheers,
Dominik