Fetch aad token against tenant's authority (#1004)

src/hooks/useAADAuth.ts

@@ -56,6 +56,7 @@ export function useAADAuth(): ReturnType {
       });
       setTenantId(response.tenantId);
       setAccount(response.account);
+      localStorage.setItem("cachedTenantId", response.tenantId);
     },
     [account, tenantId]
   );

src/hooks/useKnockoutExplorer.ts

@@ -98,9 +98,11 @@ async function configureHostedWithAAD(config: AAD): Promise<Explorer> {
     const msalInstance = getMsalInstance();
     const cachedAccount = msalInstance.getAllAccounts()?.[0];
     msalInstance.setActiveAccount(cachedAccount);
+    const cachedTenantId = localStorage.getItem("cachedTenantId");
     const aadTokenResponse = await msalInstance.acquireTokenSilent({
       forceRefresh: true,
       scopes: [hrefEndpoint],
+      authority: `${configContext.AAD_ENDPOINT}${cachedTenantId}`,
     });
     aadToken = aadTokenResponse.accessToken;
   }