there are multiple posts / blogs how to configure a WSO2 IS resident IdP. Great. Is there a way how to configure the resident SAML IdP (EntityId) ?
g.
Yes there is a way to configure.
Log in to IS management console and In "Home" under "Identity" section click on "List" in "Identity Providers" subsection. Once you get to "Identity Providers" page, You'll see a "Resident Identity Provider" Link with a red icon. Click that link and you will go to Resident Identity Provider configuration page. In that page click on the "Inbound Authentication Configuration" (It will expand) then click "SAML2 Web SSO Configuration", it will also expand and there you will see a text box to edit the idpEntityId, with the label "Identity Provider Entity Id"