We have configured Okta as a trusted authentication provider to out SharePoint 2013 On-Premises environment. The user can log into Okta and access the SharePoint 'app' but when it connects them to the homepage, they are met with 'Sorry this site has not been shared with you'. It's like their account does not have access to SP, or is not being recognised. I can see in the logs that a valid SAML token is coming in, but I think we might be missing a step where that is converted to a valid Active Directory account.
In the deployment guide they talk about 'recommending' that we install the Okta People Picker plugin. I don't want to do this if we don't have to, I was under the impression we didn't need to add 'Okta' users into SharePoint as it would map the SAML claim to their Active Directory account and grant them the same access they would have if they were inside the network...
Any help would be appreciated.