Hi @kaihuGFS ,

It doesn't matter that you're workspace admin. Account level requires different set of premissons. To setup Unity Catalog you need to have global admin role on your tenant. Once you finished setting up Unity Catalog, you can then assign account admin or metastore admin roles to different groups/users.

So, in your case you need to find someone in your orgnianization that's account admin of your UC. He should assign you a proper role and then you'll be able to see "Manage account" page.