When users rights are activated, we advise you to be careful while creating new departments.
Indeed, you could be surprised loosing access to some departments if you are not aware of the way PlanningPME behave.
So, if you created a new department and then, while opening the planning, you do not have access to any departments or you lost the departments "All resources, human resources and material resources", this post is for you! Read it carefully!
Let's take the example of the user Mary below who have reading access to all departments but have writing access to the Marketing department only.

So, when opening the planning, she can visualise all departments but can only modify her own department:

Department creation
Now, she creates a new department on the planning that we will name "TEST":

What is then happening on the planning board?
As you can notice below, she now have access to a reduced list of departments: Departments "All resources, human resources and material resources" disappeared from the drop down department menu:

Why?
Because by default, on the users rights settings, the new department created will not be selected which means that Mary now do not have access to all departments!

How to give access to all departments to my users?
You need to check the new department created on all users profile (Menu Data -> User). This setting can take some time if you created a lot of users!
How to avoid this setting problem in the future?
Only advanced users should be allowed to have the possibility to create a new department when users rights are activated!
So, we advise you to create a group (Menu Data -> Group) who do not have the right to add departments:

To know more about users management:
- users rights documentation
- other documentation