TF400981: Failed to backup the Reporting Services encryption key.

Question

TF400981: Failed to backup the Reporting Services encryption key. You can try using RSKEYMGMT command to backup the encryption key Completed Verify Backup Encryption Key Operation: Warning

Answer 1

Hi @Pratik Makwana
According to your error message, you can try to use rskeymgmt.exe to backup the encryption key. Here is an example that you can use as a reference:

rskeymgmt -e -f d:\rsdbkey.snk -p<password>  

For more details, you can refer to this link: ssrs-encryption-keys-back-up-and-restore-encryption-keys.

Answer 2

I ran into a similar issue, but in my case it was during the deployment of Dynamics 365 Finance and Operations (on-premises) Vr. 10.0.38 with SQL Server Reporting Services (SSRS) 2019.

The backup and restore of the SSRS encryption key kept failing, throwing errors like:

Unable to back up the SQL Server Reporting Services encryption key. The operation failed with error code 2148734260. exceptionType System.InvalidOperationException stackTrace at Microsoft.Dynamics.AX.Framework.Reports.Setup.ReportsIdentityUpdater.

After a lot of troubleshooting, I found that the issue was caused by the version of SSRS:

Version 15.0.1104.39 (latest as of 2025) does not work correctly with D365 F&O in this context.

• Downgrading to SSRS 15.0.1102.1047 resolved the issue completely — the encryption key could be backed up and restored without any problems. And Reports Deploy.