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We are planning to change the authentication provider from claims-based authentication to classic windows mode. I am planning to do this by preserving the content databases and re-create the web-app with the new authentication. Can anyone tell me how to migrate the users to the new authentication i.e. relinking them with the previous identities on security groups and/or their documents? Any suggestion to do this in a better way would be great as well.

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how did you get this fixed?? i need the answer badly! – user7951 Apr 20 '12 at 8:03
up vote 1 down vote accepted

There is a command in PowerShell under a SPWeb object called MigrateUsers. But tbh im not sure if it works the other way, setting it true converts users from classic to claims. One should think setting to false would do the opposite. But I haven't tested it.

Using the Move-SPUser command with a powershell script should do the trick.

Something like this

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I know that the migrateUsers command doesnt work the other way. Thanks for the link, I might be able to extract something out of it and make it work. – Hna0002 Mar 16 '12 at 3:15
Here is a link to a script that go from claims to classic:… – Anders Aune Mar 16 '12 at 7:07
Yoohoo! This guy is a rockstar! And so are you! Thanks you! – Hna0002 Mar 16 '12 at 17:07

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