Hi... I used the belwo script to encrypt and Secure native Backups using Transparent Data Encryption (TDE). USE MASTER; CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'Password12#' GO USE MASTER; CREATE CERTIFICATE TDECert WITH SUBJECT = 'TDE Certificate' GO USE TDE_Test GO CREATE DATABASE ENCRYPTION KEY WITH ALGORITHM = AES_256 ENCRYPTION BY SERVER CERTIFICATE TDECert ; GO If I tried to backup or delete the CERTIFICATE I got this message: > Cannot find the certificate > 'TDECert1', because it does not exist > or you do not have permission. USE master; GO BACKUP CERTIFICATE TDECert1 TO FILE = 'c:\Backup\certificate_TDE_Test_Certificate.cer' WITH PRIVATE KEY (FILE = 'c:\Backup\certificate_TDE_Test_Key.pvk', ENCRYPTION BY PASSWORD = 'Password12#') DROP CERTIFICATE TDE_Test I search online about this issue ,the solution to grant permission control to user but I use my account and I have sysadmin but still couldn't grant permission and got the same message. GRANT CONTROL ON CERTIFICATE::TDECert1 TO [sa] please help me with this issue. Thank you.