diff --git a/dump_webapp_signatures.py b/dump_webapp_signatures.py
index 82da916..85d6a77 100644
--- a/dump_webapp_signatures.py
+++ b/dump_webapp_signatures.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 import kopano
-import sys
 from MAPI.Util import *
 
 try:
@@ -21,16 +20,19 @@ def main():
         print 'Please use:\n %s --user <username>' % (sys.argv[0])
     else:
         user = kopano.Server(options=options).user(options.user)
-        settings = json.loads(user.store.prop(PR_EC_WEBACCESS_SETTINGS_JSON).value)
-        if len(settings['settings']['zarafa']['v1']['contexts']['mail']):
-            if 'signatures' in settings['settings']['zarafa']['v1']['contexts']['mail']:
-                for item in settings['settings']['zarafa']['v1']['contexts']['mail']['signatures']['all']:
-                    name = settings['settings']['zarafa']['v1']['contexts']['mail']['signatures']['all'][item]['name']
-                    filename = '%s-%s-%s.html' % (user.name, name.replace(' ', '-'), item)
-                    print 'Dumping: \'%s\' to \'%s\' ' % (name, filename)
-                    with open(filename, 'w') as outfile:
-                        outfile.write(settings['settings']['zarafa']['v1']['contexts']['mail']['signatures']['all'][item]['content'].encode('utf-8'))
-
+        try:
+            settings = json.loads(user.store.prop(PR_EC_WEBACCESS_SETTINGS_JSON).value)
+        except Exception as e:
+            print 'Could not load WebApp settings for user %s (Error: %s)' % (user.name, repr(e))
+        else:
+            if len(settings['settings']['zarafa']['v1']['contexts']['mail']):
+                if 'signatures' in settings['settings']['zarafa']['v1']['contexts']['mail']:
+                    for item in settings['settings']['zarafa']['v1']['contexts']['mail']['signatures']['all']:
+                        name = settings['settings']['zarafa']['v1']['contexts']['mail']['signatures']['all'][item]['name']
+                        filename = '%s-%s-%s.html' % (user.name, name.replace(' ', '-'), item)
+                        with open(filename, 'w') as outfile:
+                            print 'Dumping: \'%s\' to \'%s\' ' % (name, filename)
+                            outfile.write(settings['settings']['zarafa']['v1']['contexts']['mail']['signatures']['all'][item]['content'].encode('utf-8'))
 
 if __name__ == '__main__':
-    main()
\ No newline at end of file
+    main()