Dear Juan Antonio Otero Abbruzzese,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
Based on your description, I understand that you have a query "Outlook category allocation".
In Office 365, the ability to assign categories in Outlook is typically available to individual users. By default, users have the ability to create and assign categories to their own items, such as emails, appointments, or tasks.
If you've been assigned a category that you cannot unlock or modify, it's possible that another user with higher permissions or an administrator has assigned that category to your item. In this case, you may not have direct visibility into who assigned the category within Outlook itself.
To determine who assigned a specific category to your item, you may need to contact your IT department or system administrator. They should have access to the necessary administrative tools and logs to track the assignment of categories within your organization. They may be able to investigate the situation further and provide you with the information you need.
I hope this helps! Let me know if you have any further questions or concerns; Please understand that our initial reply may not always immediately resolve the issue. However, with your help and more detailed information, we can work together to find a solution. Thank you for your cooperation.
Sincerely,
De Paul | Microsoft Community Moderator