I am using Telerik Reports Server Q1 2016. I have two problems while configuring the Authentication in Reports server. 

1. Save button hides behind the footer. 
Am unable to see the save button for the authentication section. I have set the position in the developer tools and makes it visible. 

2.The external authentication settings cannot be validated.
I am getting this error while saving the authentication settings. 
Please refer the sample values i given in the field. 

Enabled: True
Metadata URI : https://customFederationServer/FederationMetadata/2007-06/FederationMetadata.xml 
Relying Party ID : http://mylap-3918:83 (url of the application)
Authority: https://customFederationServer/adfs
Client ID: 1234

When i enter the above details and click on save button, i got an error "The external authentication settings cannot be validated". 

Any information would help. 

Thanks,
Sankar