You can setup an Automation Rule like this:

for record in records:
    if record.create_date != record.write_date:
        raise UserError('Editing/Deleting Chatter Messages has been disabled!')

The rule would be define on the mail.message model, with the trigger Create and Edit.  When updating would be left blank.  The if statement on line 2 ensures that the rule only runs on edits / updates / deletions and not the creation of new messages.

Hello Damian Bielecki,

To disable the delete and edit buttons in the chat, please refer to the following link:

https://www.odoo.com/vi_VN/forum/support-1/avoid-deleting-log-note-270866

If you have any questions or need further assistance, feel free to reach out.

Thanks & Regards,

Email: odoo@aktivsoftware.com           

Skype: kalpeshmaheshwari