Hi KV Singh.
I would not recommend changing time on the Commserver due to below reasons.
- A few hours change in time will cause Commserver to detect the time change and will disable data aging.
- The Commserver will create a CA certificate based on the new time. This will cause backups to fail and communication issues due to certificate mismatch between Commserver and the clients.
- Schedules will go haywire due to change in time.
- Webconsole report will SLA and other report will report incorrectly.
If you have any questions or issue with retention, I suggest opening a case with Commvault support team and they will be happy to assist.
BOL reference: Confirming CommServe Server Time Change (commvault.com)