After migrating ER to new server, schedules reports are not generating the PDF or CSV file of reports to share folder indicating does not have permissions to the shared folder.
Ensure the account running the Enterprise Reporter services has the correct access, Grant that account Full Control on the shared folder where PDFs are stored. Log into the ER server using the service account (or "Run As").Open File Explorer and try accessing the path of shared folder and see if you can access it or not.
Temporarily create a new shared folder (e.g., \\newserver\testpdf).Give the ER service account Full Control. Point a test report output to that share. If this works, the issue is definitely with the original share permissions.