How often do O365 actions retry if they fail to connect to the O365 tenant.
Each query execution has a timeout of 1.5 minutes. The default timeout of the SharePoint SDK (CSOM) is what is used
All Office 365 actions have the same retry behavior.
To add functionality to the the O365 workflow engine Nintex's Office 365 actions call outside of the tenant to Nintex Infrastructure. The Nintex infrastructure then logs back into the tenant to perform the required activity. Sometimes there can be issues with connecting to the tenant due to a range of issues between Microsoft, Nintex and the Internet. As this is the case Nintex has retry functionality built in so that the workflow does not immediately suspend.