In addition to the documentation website (see Additional Manuals and User Guides), there are a range of website that provide information about Avaya products and services including IP Office.
This is the official website for all Avaya business partners. The site requires registration for a user name and password. Once accessed, the portal can be customized for specific products and information types that you wish to see and be notified about by email.
This site provides details on APIs and SDKs for Avaya products, including IP Office. The site also provides application notes for 3rd-party non-Avaya products that interoperate with IP Office using those APIs and SDKs.