Powerbi reportserver is not show connection string and credential after restore

Did you restored the encryption keys as well ?

my issued was solved . I do the step as below 

- backup reportserver and reportservertempdb from production cluster then restore on the new cluster

- backup encryption key from production and restore on the new cluster

-  Delete unuse hostname 

USE ReportServer;

GO

begin tran

DELETE FROM dbo.Keys

WHERE Machinename in ('....')

GO

commit

- Restart PowerBI service 

- check Connection string and it's show as the same as production

thank you,

Peach