Offline Area Fails to create in Enterprise Portal

[DavidEvans5]

I am having trouble with getting the Offline Mode to work within maps published within our Enterprise Portal (version 11.0). 

I've been trying to trouble-shoot my way to a solution by starting out with a freshly created feature, stored in our SQL Server hosted SDE Geodatabase that I shared as Web Layer (feature service?) to our Enterprise Portal Hosting Server from ArcGIS Pro. The feature has Versioning enabled. I can't seem to enable "Branch" versioning work due to locks within the database, so I used the "Traditional" option, and tried with the "Move Edits to Base" option both checked and unchecked.

In the Share as Web Layer settings I ensure that the feature service is a dedicated instance and that the "Enable Sync" box is checked in the Feature Properties (I leave the default "Create a version for each downloaded map" box checked under Sync)

Everything publishes fine and I can add the feature to a Web Map and edit points as normal, but when I then try to create an offline area either in the Web Map settings or in Field Maps, it fails without giving me any sort of detailed error message. I checked the Server Logs and there's no obvious references to the related Web map or the Feature service that I can see there either. 

If someone int he community has experience with getting offline functions to work in an Enterprise Portal environment and might have some insight into what I'm doing wrong, or missing please let me know. 

Thanks!

David

[DanielFox1]

Hi @DavidEvans5 

Few things to check:

1. Is the offline packaging service started 

https://<your-hosting-server>:6443/arcgis/rest/services/System/OfflinePackaging/GPServer

2. Validate the web map for offline use

- Open the map’s item page in Portal.
- Go to Settings > Offline and click Check Compatibility.
- If the toggle is disabled, it will list which layers are incompatible.

3. Is your basemap offline enabled?

4. Check for Proxy Restrictions

- If your Portal has allowedProxyHosts configured, internal domains must be listed.
- Otherwise, offline packaging may fail silently with a 400 error.

5. There is a known bug (BUG-000157485 - Unable to create an offline area for a large data size in Portal for ArcGIS due to a size limit.) This was logged at 11.0 but the fix is noted as the following: 

"This defect is resolved for version 11.1 in the Portal for ArcGIS 11.1 Sharing Patch. The patch is available from: https://support.esri.com/en-us/patches-updates/2023/portal-for-arcgis-11-1-sharing-patch.

By default, at Portal for ArcGIS 11.1, the maximum size of offline map area packages is 1 GB. After the ArcGIS 11.1 Sharing Patch is installed, users can increase this maximum size using a configuration file within the Portal installation directory. See the steps below:

1. Install the Portal for ArcGIS 11.1 Sharing Patch.
2. On the machine hosting Portal for ArcGIS, navigate to the following path within the Portal for ArcGIS installation directory ...\Portal\framework\webapps\arcgis#sharing\WEB-INF\classes\resources
3. Open the "gw-config.properties" file within a text editor.
4. Locate the "content.file-download-max-filesize" property and update the default value of "1024" (i.e. 1 5) gigabyte represented in megabytes) to a value of user selection.
5. Save the file.
6. Restart the Portal for ArcGIS system service.

This defect is addressed in the Portal for ArcGIS Security 2025 Update 1 Patch. The URL is:
https://support.esri.com/en-us/patches-updates/2025/portal-for-arcgis-security-2025-update-1-patch
Patches are available for versions 11.4, 11.3, 11.2, 11.1, and 10.9.1. Please refer to the “Issues addressed with this patch” section of the patch page to determine the version(s) where this defect is addressed."

6. Worth also checking your data has Global IDs, one layer can be edited, projections are the same with the basemap, no hyphens in the field indexes of the layers, any field names longer than 32 characters. Theses are somethings that can stop areas coming offline.