As of FME 2024.0, support for Esri ArcGIS Online (AGOL), ArcGIS Enterprise Portal, and ArcGIS Server Feature Service formats has transitioned to a unified approach using the new Esri ArcGIS Feature Service (Format). This format replaces the legacy reader/writer formats for each of the three services.
Starting in FME 2026.1, the legacy formats will be hidden in the Quick Add menu. Instead, equivalent functionality is now provided by the downloadable Esri ArcGIS Connector package, available on FME Hub. The package also includes new web services and key transformers such as the ArcGISOnlineConnector, ArcGISAttachmentConnector, and ArcGISBranchVersionManager. The package can be installed directly through the Quick Add menu in FME Workbench. Once installed, the new Esri Feature Service format will appear in the Gallery as a unified method for interacting with all three types of Esri ArcGIS Feature Services.
For details on this transition, including guidance on updating existing workspaces, please refer to the article: Working with Esri ArcGIS Feature Services in FME.
Consideration
ArcGIS Online web connections in FME rely on an application registered by Safe Software. If your organization has restricted third-party app access, this shared application may be blocked, preventing you from creating or using an ArcGIS Online web connection.
Why This Happens
ArcGIS Online includes a security setting called "Members can only sign in to external apps that are approved." This can be found under Settings > Security > Apps.
When this setting is enabled, FME's built-in ArcGIS Online web service (Client ID OSNnG92IVpxtDLHf) may be blocked because it is an external application not on your organization's approved list.
How to Resolve It
Option 1 (Preferred): Register your own application
Register a dedicated ArcGIS Online application under your own organizational account. This gives you a unique Client ID and Client Secret to use when creating a custom ArcGIS Online web service in FME. The Safe Software-provided web service definition should be used for demo purposes only. For step-by-step instructions, see How to Create an ArcGIS Online Web Connection (OAuth 2.0).
Option 2: Adjust the security setting
Either disable the "Members can only sign in to external apps that are approved" setting, or add the FME application (Client ID OSNnG92IVpxtDLHf) to your organization's approved application list in ArcGIS Online.