Here we will discuss how we can manually trust a SharePoint hosted add-in developed using visual studio 2015 in SharePoint online site. Recently we were developing a SharePoint hosted add-in and in the AppManifest.xml file we have specify the permissions for SharePoint Add-in will request while installation time. Once we deploy the SharePoint add-in, it will ask you to trust the Add-in like below:
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manually Trust SharePoint Add-in
If you are not able to Trust the Add-in after deployment, we can also trust it from the site itself like below:
Open the developed site and then open the “Apps in Testing” document library, where all Apps will be there. click on the … for the particular add-in and then click on “MANAGE PERMISSIONS” tab like below:
This will open the same screen where you can Trust the application. Hope this will be helpful.