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SPMT when source site opens new tab to site but does not continue RRS feed

  • Question

  • Hey all,

    I am trying to migrate a SP2010 site to O365. I add the source site, it has the spinning symbol over it and opens a new tab that is the SP2010's site login. I log in and it lets me move around the site as if i opened it in a browser and that's it, it never goes past that.

    If I close the site tab I get this error ""Cannot get Claims Based Cookies. Please clean the cookies and try again. Windows authentication in multiple authentication mode is not supported for this version."

    The Server has poor documentation so I'm not sure what claims are in use. Any ideas?

    Thursday, July 16, 2020 2:11 PM