diff --git a/launcher/pages/global/AccountListPage.cpp b/launcher/pages/global/AccountListPage.cpp
index a3cd86a4..286bbeec 100644
--- a/launcher/pages/global/AccountListPage.cpp
+++ b/launcher/pages/global/AccountListPage.cpp
@@ -69,6 +69,12 @@ AccountListPage::AccountListPage(QWidget *parent)
     connect(m_accounts.get(), &AccountList::activeAccountChanged, this, &AccountListPage::listChanged);
 
     updateButtonStates();
+
+    // Xbox authentication won't work without a client identifier, so disable the button
+    // if the build didn't specify one (GH-4012)
+    if (BuildConfig.MSA_CLIENT_ID.isEmpty()) {
+        ui->actionAddMicrosoft->setEnabled(false);
+    }
 }
 
 AccountListPage::~AccountListPage()