I'm developing a small site with SharePoint Online and Office 365. For this I'm using the approval template which is in SP 2010 template.When I try to open my site with SPD 2010 it's not working. It gives error as :
microsoft sharepoint designer cannot be used to edit websites on servers different from Microsoft SharePoint Server 2010. To edit these sites, you need to use the same version of SharePoint Designer which matches the version of Microsoft SharePoint Server
Of course I can open it with SPD 2013, but there isn't any possibility to use the http-action (because it's in 2010 template).