Open the Advanced Authentication Administration portal.
Click Events > New Event.
Create an event with the following parameters:
Name: specify a preferred name that indicates the use of this event. For example, ArcSight
Event Type: SAML2
Chains: select the required chains.
SP SAML 2.0 meta data: Paste the content of the file https://EXTERNAL_ACCESS_HOST/osp/a/default/auth/saml2/spmetadata
or
Click Choose File and upload the saved XML file.
Select Send E-Mail as NameID (suitable for G-Suite) from NameID formatting options.
Click Save.