Changing adm user password and Impact (SAP B1 HANA High Availaibility)

Hello

We have a customer which we implemented SAP B1 HANA in High availibility (2 Hana server in a Cluster)

And they request a new <SID>adm password that they will share to a compagny for monitoring the server .

My question is , what is the impact of changing the password of the <SID>adm user (os) ?

It's a production system so it's very sensitive and we cannot accept the system to be down . Can SAP confirm that there will be no impact changing the password for this user in both cluster environnement please ?

Thanks