This closes #518

locations/jclouds/src/main/java/org/apache/brooklyn/location/jclouds/ComputeServiceRegistryImpl.java

@@ -90,7 +90,7 @@ public ComputeService findComputeService(ConfigBag conf, boolean allowReuse) {
         // retrying their API calls.
         properties.setProperty(Constants.PROPERTY_RETRY_DELAY_START, "500");
         properties.setProperty(Constants.PROPERTY_MAX_RETRIES, "6");
-        
+
         // Enable aws-ec2 lazy image fetching, if given a specific imageId; otherwise customize for specific owners; or all as a last resort
         // See https://issues.apache.org/jira/browse/WHIRR-416
         if ("aws-ec2".equals(provider)) {
@@ -139,6 +139,12 @@ public ComputeService findComputeService(ConfigBag conf, boolean allowReuse) {
             // the default timeout was 500ms so let's raise it in case that helps
             properties.setProperty(EC2Constants.PROPERTY_EC2_TIMEOUT_SECURITYGROUP_PRESENT, ""+Duration.seconds(30).toMilliseconds());
         }
+        else if ("azurecompute-arm".equals(provider)) {
+            String region = conf.get(CLOUD_REGION_ID);
+            if (Strings.isNonBlank(region)) {
+                properties.setProperty(LocationConstants.PROPERTY_REGIONS, region);
+            }
+        }
 
         // FIXME Deprecated mechanism, should have a ConfigKey for overrides
         Map<String, Object> extra = Maps.filterKeys(conf.getAllConfig(), Predicates.containsPattern("^jclouds\\."));