Hot answers tagged single-sign-on
You could use an STS: Windows > ADFS Forms > custom one (eg http://identityserver.codeplex.com/ or create one) All SharePoint sites that make use of the same STS will effectively have SSO. A drawback to STS/Trusted Identity Providers is the bad People Picker experience; no resolving of partial entries, every mapped claim can be selected, ... Not a good ...
If you are just using the default Windows authentication this should not be a problem at all - even with claims based authentication. Make sure the SharePoint URLs are in the "Intranet Zone" of the browser and your users should be logged on automatically - even without Kerberos. For this basic scenario you don't need ADFS or any other identity provider.
OR...you could NOT use PORT numbers for your MySite web application and either create a unique URL like http://mysite or http://my (or whatever works for your organization and culture). Then set trusted sites. OR, If the users are non-domain users (the new domain will trip an auth prompt when you switch hosts) you could create the MySite host under a ...
You need to configure ADFS with SharePoint. Essentially its a type of Claims Authentication with a conceptual walkthrough mentioned here This is an excerpt from MSDN that explicitly mentions the flow of a single user from one web app to another in SharePoint Visiting Two SharePoint Web Applications In this walkthrough, John visits the a-Portal ...
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