I am doing a two hop upgrades from SP2007 to SP2013. For testing I first upgraded a small content db from 2007 to 2010. The 2010 web application is still using classic auth.
Next I attach the 2010 db to 2013. I run Test-SPContentDatabase it show the inconsistency between claim and classic auth but the UpgradeBlocking show FALSE so I go ahead to mount the DB and upgrade.
The site collection is show up in the SP2013 farm, I can then upgrade the site to 2013 look and feel. I can login , view the content and also assign AD user permission too.
I learn from here (https://samlman.wordpress.com/2015/03/01/converting-a-classic-auth-content-database-to-claims-auth-in-sharepoint-2013/) perhaps I should convert the DB to Claims Auth, but the MigrateUsersToClaims return False in the result.
So I don't understand, Is it using Claim in the migrated site collection?
Is the MigrateUsersToClaims necessary ?