diff --git a/app/src/main/java/eu/faircode/email/CloudSync.java b/app/src/main/java/eu/faircode/email/CloudSync.java
index 1d33b350fc..39880ebc44 100644
--- a/app/src/main/java/eu/faircode/email/CloudSync.java
+++ b/app/src/main/java/eu/faircode/email/CloudSync.java
@@ -84,6 +84,15 @@ public class CloudSync {
             return;
 
         JSONObject jrequest = new JSONObject();
+        if ("login".equals(command)) {
+            String iab_json = prefs.getString("iab_json", null);
+            String iab_signature = prefs.getString("iab_signature", null);
+            if (!TextUtils.isEmpty(iab_json) & !TextUtils.isEmpty(iab_signature)) {
+                Log.i("Cloud IAB " + iab_json);
+                jrequest.put("iab_json", iab_json);
+                jrequest.put("iab_signature", iab_signature);
+            }
+        }
 
         EntityLog.log(context, EntityLog.Type.Cloud, "Cloud request=" + command);
         if ("sync".equals(command)) {
diff --git a/app/src/main/java/eu/faircode/email/FragmentOptionsBackup.java b/app/src/main/java/eu/faircode/email/FragmentOptionsBackup.java
index 8ad580070d..082a9c49f9 100644
--- a/app/src/main/java/eu/faircode/email/FragmentOptionsBackup.java
+++ b/app/src/main/java/eu/faircode/email/FragmentOptionsBackup.java
@@ -217,6 +217,7 @@ public class FragmentOptionsBackup extends FragmentBase implements SharedPrefere
             }
         });
 
+        btnLogin.setEnabled(!BuildConfig.PLAY_STORE_RELEASE || ActivityBilling.isPro(getContext()));
         btnLogin.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -1112,6 +1113,8 @@ public class FragmentOptionsBackup extends FragmentBase implements SharedPrefere
 
                             if ("pro".equals(key) && !BuildConfig.DEBUG)
                                 continue;
+                            if ("iab_json".equals(key) || "iab_signature".equals(key))
+                                continue;
 
                             if ("accept_unsupported".equals(key))
                                 continue;
diff --git a/app/src/play/java/eu/faircode/email/ActivityBilling.java b/app/src/play/java/eu/faircode/email/ActivityBilling.java
index 8aecd92c03..e23969ed31 100644
--- a/app/src/play/java/eu/faircode/email/ActivityBilling.java
+++ b/app/src/play/java/eu/faircode/email/ActivityBilling.java
@@ -485,6 +485,8 @@ public class ActivityBilling extends ActivityBase implements
                                     if (isPurchaseValid(purchase)) {
                                         editor.putBoolean("pro", true);
                                         editor.putLong(sku + ".cached", new Date().getTime());
+                                        editor.putString("iab_json", purchase.getOriginalJson());
+                                        editor.putString("iab_signature", purchase.getSignature());
                                     }
 
                                     if (!purchase.isAcknowledged())