Hello,

A client of ours recently migrated from WSS 3.0 to SharePoint Foundation 2013 via a series of database-attach upgrades. The content upgrades all completed successfully, and then the sites were upgraded to Claims authentication, which also appears to have completed successfully. The issue we've run into is that certain users are getting the message "Sorry, you cannot access this page" when browsing into sub-folders inside a shared document library. They are able to see all the folders they have permission to, but they get denied when they try to browse into the folders through the site; however, if they click the ellipsis button and select "Share" they can get into the selected folder by entering the share URL into their browser, and they can also get into the sub-folder using Explorer mode. Has anyone seen this before, or have any idea what might fix this?

Thank you in advance for any help!

Hi Collin,

What permissions did the problematic users have?

Please check your enter user login using SharePoint 2013 claims encoding. It must be in this format i:0#.w|domain\user. If not, please run the following command to migrate user:

$wa = get-SPWebApplication [your web application]
$wa.MigrateUsers($true) 

Please check if the article is useful for you:

http://bartwullems.blogspot.com/2013/05/users-cant-login-after-migrating-to.html

Thanks,

Wendy