KB4089099 - FIX: It takes a long time to restore a TDE-encrypted database backup in SQL Server

Work anywhere from any device with Microsoft 365

Upgrade to Microsoft 365 to work anywhere with the latest features and updates.

Upgrade now


Consider the following scenario:

  • You enable transparent data encryption (TDE) in SQL Server.

  • You use asymmetric encryption keys to protect the backup of the SQL Server database.

  • You store the asymmetric encryption keys in the SQL Server Extensible Key Management (EKM) provider.

  • You restore the backup of the SQL Server database.

In this scenario, it may take a long time to complete the restore, due to unnecessary communications with the EKM provider.


This issue is fixed in following cumulative updates

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest updates for SQL Server:


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Learn about the terminology Microsoft uses to describe software updates.

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

Thank you for your feedback!

Thank you for your feedback! It sounds like it might be helpful to connect you to one of our Office support agents.