When i try to use our own portal as dev mode using survey123 URL opened in Browser. it is working as expected . But when i try to use Signature or image Upload attachments. The attahments are not adding into _ATTACH table. But when i try to do same in App, it is working as expected. is there any limitation with Browser
Yes there are some limitations with using the web app and accessing Portal, you must ensure your Portal is public facing (accessible through firewall in your network). Also what version of Portal are you using and what version of Connect/App, or did you create via Web Designer? Other users have encountered some similar issues where the required capabilities of the feature service/layer in Portal are not enabled. Can you confirm if the following are enabled:
We are using ArcGIS Server 10.6.1, Portal 10.6.1, Survey Connect 3.0.142 and i created forms using Survey Connect. The only thing is its not facing publicly. Just to confirm that, Is Portal needs to face public ?
Yes, if you are wanting to use the survey123 website that is hosted publicly on the internet and access your internal Portal, then the Portal needs to accessible from the internet. Otherwise the website and web app can not access and query the surveys, data and images required to load correctly.
We are currently working on an on-premises version of the website and web app that will be available to install locally in your network for Portal users. This is currently in beta and available on the Survey123 EAC website . Currently it requires a manual step by step installation and is not fully supported, but can be tested as beta release if that is an option.
Please have a look at the following post which contains a similar issue with a workaround for you to try:
Let me know if you have success.