Many thanks Alex for your valuable input,
I secured my ArcGIS Server feature services, and then plugged them in the AGOL map, after that, downloaded the map via the collector app, it asked me about the service credentials, and when I started downloading the map, a new version that has a name related to the user was created. However, I got a new confusing problem; after securing the services, when I tab on any feature (Buildings in my case), its data is duplicated! This is better illustrated with the screenshots below.
What might be the issue this time?
Thank you again and Best Regards,
Hani
1- It asked for the logins. OK
2- When The map is downloaded via the collector app, a new version is created with name related signed user. OK
3- When I click or tab on any feature, the attributes are duplicated!! What might be the issue here?