Yes, Dynamics 365 attachments/documents migrated to SharePoint, Dropbox and Azure Blob Storage are easily accessible. By using Attach2Dynamics UI, one can easily perform a number of actions such as view, download, email, copy link, delete, etc. on the attachments stored in any of the three cloud storages. Also, the links of migrated Note attachments are stored in the note description. For Email and Appointment entity, a note is created against the entity where the attachment links are stored.