Hi,
In reference to " my service in account express as items and sync it through invoice express and copper." The synchronization is done when using Express Invoice or Accounts to Inventoria, OR when Using Inventoria and Copper,. Express Invoice and Express Accounts and/or Copper do not integrate.
"is there a way to sync customers and suppliers?" ONLY items can be synchronize if using any of the above mentioned options.
" is there a way to push purchase orders to accounts?" You can create Purchase Orders from the top menu Purchase → Create New Purchase Order option.
Regards,