Connection to SharePoint

0

Hello everyone,

I need your help with a task that should actually be relatively simple.
I'm trying to establish a connection to my Site Collection in SharePoint and have entered the relevant data (Server and Site Collection, User, ...). When I click on "test", it loads for several seconds, and I get the error: Unable to connect to the remote server.
Regarding my rights in SharePoint: I am the owner of the Site Collection.

What could be the cause of this?

Thanks in advance!