Yes you can configure multiple sync handlers. But make sure that you map login module with right sync handler.

Yes you can do that. In AEM 6.1 you can add multiple LDAP identity provider configurations in /system/console/configMgr. If your user/group mapping is common across all the AD instances then just define one single sync handler configuration for the user/group mapping and give it a name. Then create ...

I guess you are looking for creating a custom product creation/edit page just like geometrixx outdoors. You can set up your page by creating a scaffolding configuration for your product data path. For example , your product data lives under /etc/commerce/products/demo then you just need to add a sca...

You can solve this problem if you address your thumbnails with the following short URL -  /content/dam/sitename/1.pdf.thumb.140.100.png instead of using the following long URL - /content/dam/sitename/1.pdf/_jcr_content/renditions/cq5dam.thumbnail.140.100.png

You can try the following-if (typeof CQ.WCM.MODE_EDIT == "undefined") { //Touch UI } else { //Classic UI }

If you have multiple PDFs/assets which require authentication then why not create an assets listing page which can be shown to authenticated users. You can set CUG (Closed user group) properties on the listing page so that only required group of users will have access to it via login. If you want to...

You should use Sling service resource resolver for getting session inbackend services. This is now recommended for getting sessions as  itrestricts the access to the service code only on the required repositorypaths unlike loginAdministrative which exposes full permissions to yourservices. You can f...

You can create the template node (cq:Template) of the page with the jcr:content node having the property name and value preset on it. And then when you create the page content then it should automatically have the value set. 

The ffmpeg path should be set in the system PATH environment variable.

AEM DAM Touch UI provides Bulk metadata editor for such operations. You can apply tags to multiple assets in one step. For more details see this documentation - https://docs.adobe.com/docs/en/aem/6-1/author/assets/managing-assets-touch-ui/managing-multiple-assets.html