Hi @Dominique_Baril-Robe, welcome to the Asana Community Forum and thanks for sharing your feedback with us!
When you update your Asana account password, we send a confirmation email after the change:
From your message I understand you’d like to get a message in a pop-up window as soon as you click “Save”. I think this is a great idea and I’ll make sure to sent it to our product team so it can be considered in future updates.
If you have any issues to access your Asana account, I also recommend you contacting our support team: How to contact our Support Team ✉
Let me know if you have any other questions.