Forum Discussion
Old EEEU not working and transition from Classic to SP
Going out on a limb here, but I think they introduced a problem when they tried to fix the fact that the folders were previously getting stamped with "last modified by" information that was incorrect. Now folders are getting stamped with last modified by "stream migration admin," and every time you touch the destination folder with the Migration tool, it's going to alter permission on that folder again.
In our case, we were migrating multiple Companywide Channels to a single site collection, single "Stream Migrated Videos" folder. My fix was to go into advanced settings on this folder, seeing the classic SharePoint permissions interface, and do a "Grant Permission" step. In that dialog box, there's a check available for "Share everything in folder, including items with unique permissions." In this process, I granted permission to the site's Visitors group which included EEUE.
I was unable to figure out how to do this in the modern permissions interface, and I also had trouble in the modern permissions dialog with choosing the site collection's built-in security groups (owners, members, visitors) because it wants to use M365 groups published in the GAL. But the local site collection security groups are easier find and use in classic dialog box.