Is there a way to view all team folders accessible to a specific user?

To view files and folders shared with a specific user, use the custom report titled “Get files/folders shared with user.” For detailed instructions, refer to the documentation at:
https://docs.filecloud.com/fcdoc/latest/server/filecloud-administrator-guide/filecloud-site-maintenance/custom-reports

Alternatively, open Team Folders in the Admin Portal and review the share settings for each folder to verify whether the specific user is listed.

From the end-user side, all accessible Team Folders are visible in the Team Folders section of the User Portal.