Ok i just got it working. What i needed to do was setup an additional app within Okta using the Template for SAML 2.0. The Post back URL, Recipient and Destination are all set to https://us-api.mimecast.com/login/saml
The Audience Restriction is us-api.mimecast.com.<cust#> for example us-api.mimecast.com.CUSA12A123
Thats all you need on the Okta app part. I also selected mine to not be displayed in the Okta portal for users being that its just for the Outlook Client. Next is the setup with Mimecast.
Within the Mimecast Admin portal go to Services, Applications, Authentication Profiles. If you already have the admin and MPP configured with SAML just go into the current profile you have setup for that. Scroll down and check the box for Enforce SAML Authentication for End User Applications. The SAML setup instructions given from the Okta portal will help you fill this out. Save that and you should be all set. I hope this helps. If you have any issues just respond back and i will keep checking back.
Hi Jeff Janovich.... i am trying to sort out this setup however what is the settings i need configure on the outlook plug-in, the only credentails i can set are the cloud authentication, is that correct? if yes the authentication doesnt seem to work
Hi, I'm struggling with this. I followed the directions but if I try to log in with the Outlook plugin it times out. If I try to just use the Okta app I get redirected to https://protect-eu.mimecast.com/connectivity?status=false but I'm not sure if that should work just with a browser. I have no problems with my Personal Portal setup just this. Any ideas? Thanks David