@arubislander said in How to change the password of a system account?:

I think the main issue is that your token gets invalidated because of the password change. Did you use your actual account password? What if you create an application password in Nextcloud and use that instead?

EDIT: I can confirm that if you add the account using an application password, then changing the account password has no effect on the token, and you continue to be able to access the server from both Ghostcloud and UBSync.

This is a good idea! I did not think of that.
I will try this too, thank you!

EDIT: App password works, this is the way! I'll just trust it will still work when I change the user PW. XD