Single Sign On (SSO) is preferred
The preferred method for you to sign-in is via your organisational Microsoft365 or Google Business account, or via a personal Microsoft, Google, or Facebook account.
If you have signed in using one of these methods then by default there is no password on this website for you to manage. You can change your password with Microsoft365, Google Business, Microsoft, Google, or Facebook via their websites.
Username and password
If you signed in to this website with a username and password then you should see a Change password menu item under your user menu on the top right of the screen.
If you normally sign-in with a username and password but you have forgotten your password you can chose the Forgot my password link on the sign-in screen.