Setup VDP fails during vCenter registration

Hi,

I want to setup the vSphere Data Protection VM. The Import was successful.

But after that I opened the Webbrowser, entered "https://IP-aress:8543/vdp-configure".

At the side "vCenter registration" I entered

-vCenter username

-vCenter password

-vCenter hostname

-vCenter port (443).

But what I have to enter at "SSO hostname"???

I tried the same hostname like the vCenter hostname, because I installed the vCenter SSO at the same machine.

I always get an error message, if I want to test the connection:

"The connection test did not complete successfully.

Modify your network settings or VDP credentials

and then click "Test connection" to run the

connection test again."

See also in the screenshot.

In the DNS I registered the VDP machine, also with a reverse lookup.

What is wrong?

Kind regards,

Andre