I've been reading about SharePoint 2010's Claims based authentication support. At this point, my shop has several clients who may not upgrade for a while, however. In making our other services claims compatible, we're wondering if claims based authentication is realistic without a great deal of reworking of existing cod开发者_开发百科e in our 2007 installations?

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I planned on implementing Geneva (now WIF) in MOSS 2007 last year for a blog series, but I didn't get around to it.

When I looked into it, it was entirely possible, and just required extending your SharePoint site in the same manner you would for a Forms Based Authentication provider.

If you need more info, I can go back to my notes and see if I can scrounge up some detail.

Edit

Check out this blog post for more information on setting up claims on SharePoint 2007.