Certificat problem for collaboration between 2 arcgis enterprise

[kvin]

Hello,
I have an Arcgis enterprise 10.8 under windows.
I would like to collaborate with another arcgis enterprise.
I imported the certificates of the other collaboration in the portaladmin of my arcgis web server, however when I accept the invitation response of the collaboration I have the following message:

"Invalid SSL certificate found. PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target"

"Collaboration invitation response validation failed for file 'collaboration-topo.vdl.lu.response' for collaboration with name 'Collaboration VdL-CGDIS', id '63a4ffb851cc4e6aa8ee941b6f343fb1'. Failed to validate SSL certificate for 'https://topo.vdl.lu/portal109'."

What is the format of the certificates I need to import from the other argis enterprise.

Is it in .cer, .crt format?

Kind regard

[Sakib_Meharan_Siddiquei]

Hi, 

the organization Portal does not trust the SSL cert on the Host. The SSL certificate must be trusted before the invitation can be accepted. 

Regards,

Sakib

[kvin]

Hi,

How do you do this on arcgis web server ?

Is there a specific command ?

"The SSL certificate must be trusted before the invitation can be accepted" ?

Regards

[Sakib_Meharan_Siddiquei]

Maybe I expressed myself wrong, there is no specific command. That I meant is to make sure the Certificate is Trusted in the opposite Portal, before sending the request, only then accept the invitation from the first Portal.

Regards.

[kvin]

Hi,

I added the url to collaborate in NoProxyHost.
Thanks for your help.