Update custom-data.md

Author: mimckitt

articles/virtual-machines/custom-data.md

@@ -87,8 +87,7 @@ Azure currently supports two provisioning agents:
 ### Can I update custom data after the VM has been created?
 For single VMs, you can't update custom data in the VM model. But for Virtual Machine Scale Sets, you can update custom data. For more information, see [Modify a Scale Set](../virtual-machine-scale-sets/virtual-machine-scale-sets-upgrade-scale-set.md#how-to-update-global-scale-set-properties). When you update custom data in the model for a Virtual Machine Scale Set:
 
-* Existing instances in the scale set don't get the updated custom data until they're reimaged.
-* Existing instances in the scale set that is upgraded don't get the updated custom data.
+* Existing instances in the scale set don't get the updated custom data until they're updated to the lastest model and reimaged.
 * New instances receive the new custom data.
 
 ### Can I place sensitive values in custom data?