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In here, click the one named yourSite-DC-LoginService-NC and press Recycle.
Error handling
If you come to the scenario where the SSO page will not load (See image below), do the following steps to reset your configuration:
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Access your database, and locate the table called LoginService_SsoConfigurations.
There should only be one row in here.
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Delete the row, and recycle the LoginService, in the same way as described in the earlier section.
Now, accessing the MM’s SSO configration page, should load.