I have found the issue. Rather stupidly it was in the role section where I was forcing the users to a custom page. I had incorrrectly set this to be the root of the sharepoint site. All the other policies were set correctly, as soon as I fixed the custom page everything worked. I'm not sure how the windows shares would have helped in this case as it is not a problem accessing the files but traversing web pages. thanks for the help Adrian
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