Hi fsmits - In your screenshot the new task's project is set to "None (Personal task)" - When this is selected you can only assign personal tasks to yourself.
If you change the "Project" dropdown to a project that other users have access to then you will be able to change who the task is assigned to.
Let me know if this answers your question.
Thanks. So it means every task must be related to a project?
El 21-10-2014 14:45, "Jive Community" <firstname.lastname@example.org>
have been mentioned by David Bastedo
<https://community.jivesoftware.com/people/david.bastedo> *in Re: Why
can't I assign a task to someone else? in Jive Community* - View David
Bastedo's reference to you