Hi, quick checkup to be sure - which version of Odoo have you bought the module for, and is it Community or Enterprise? Lastly, what's the module version you're running?
Our regular customer service rep isn't active this afternoon, so bear with me during intake here. Some of the following confuses me, so forgive the technical point-of-view where it's unhelpful:
After installing the module, we have lost the field activity_user_id ( Responsible User), which was used to assign the task to a responsible employee.
How did you lose it? Are Activities not working?
Task assignation happens through "user_id" (up to Odoo 14.0) or "user_ids" (15.0 and later) - aka "Assignee(s)" - by core Odoo.
"activity_user_id" comes from the mail.activity.mixin class, which is applied to many more models than Tasks alone. It's a generic field linking responsible users for Activities on Tasks rather than assignation itself.
We can see there is a visible field called employee_ids (linked employees) but it's read only. How could we assign the task to a user ?
By default, this happens through Assignees in Odoo. We are already reviewing the configuration that shows employees for clarity and usability reasons.
We also see there is a button "assign to me", when the task is not assigned to the logged user. Pressing it will add the user to the field linked employees. But we still need to edit this manually for best management.
"action_assign_to_me"—aka the button you're seeing—is a core Odoo functionality that we would rather not touch. It's present on any Task where "Assignees" is empty by default in the software.
Now we can manually assign it to an user, and it will automatically add this user to the field linked employees. However, this is not something very normal. I think either leave only user_ids or set employee_ids as not read only.
If the user has an associated employee, then yes it will populate the employees field. This part we are indeed looking into.
Could you be facing a straightforward technical issue with Activities on Tasks? I want to make sure I understand your situation correctly.
