Our complete list of reference guides for developers:
For partners, you can access our developer training through Acumatica University hosted on our Partner Portal here.
Otherwise, you can visit Acumatica Open University
ISVs or VARs who want to develop new modules, change business logic, create reports, build integrations, and customize Acumatica using the Acumatica Cloud xRP Platform and the Acumatica customization tools. Experience with C#/.NET/Visual Studio/SQL Server is required. On average this badge takes 64 hours to complete.
Get the support you need by contacting us directly, though our Knowledge-Base, and via our various forums.
If you have lost connection to your Acumatica instance, please report the issue immediately.
Also make sure to notify your Acumatica Reseller.