Hi all, we found a privilege issues and don't know whether it is

Is it an administrative user?

@eaglez If a basic user from one group tries to access the task from other group to which he doesn't belong the following error message will be seen:
"The requested task is not available.
You may not have permission to view the task, or it may have been deleted."
It would be worth checking the group memberships of the user who is able to access the task of other group by means of link explicitly.

hi steveh, it is a basic user.

hi sikhivahans, i did check the group memberships.
the case here is :
we set the same email for all the test accounts and i'm in the email group. so i can recieve all new task notification email.
like the attached picture, the task is supposed to be assigned to another group " Client Manager".
however, i logged in as "IBG onboarding" which belongs to a different group and is just a basic user. i clicked the link in the email and can accept the task as "IBG onboarding".

this only happens in tempo. in portal app, it won't.

Note this may also be able to happen if the user has Manager permissions to the process model. In that scenario the user can access tasks assigned to other users (it is not listed in the documentation but should be AN-401222)

thank you very much , csteward.
yes, it is the root cause. originally i didn't use "Manager permissions", but there was a weird issue and it seems "Manager permissions" could fix it.

anyway, thanks again.