There are a number of options for you to provide feedback or obtain further information.
My Esri
My Esri is a website where you can interact with Esri to find answers to questions, post feedback, and obtain information. The website also contains frequently asked questions, how-to instructions, software downloads, troubleshooting tips, and so on. Sign in to the website with your Esri account. Alternatively, you can contact Customer Service or your local distributor.
Web help
Visit the ArcGIS Pro, ArcGIS Enterprise, and ArcGIS Developer websites for up-to-date information about ArcGIS software and services. These resources can help you increase your understanding of GIS technology.
Installed help
Downloads include the Install.htm help file. You can find what you need by searching the table of contents, finding terms in the index, or finding the number of times a term appears in a section.