Hi shantanu misra,
This issue can occur if your instance was set up by taking a database backup from another CRM instance where data encryption was activated. If this is the cause of your problem then you will need to update the encryption key on your CRM instance with the encryption key from the original CRM instance.
To check your current encryption key and change your encryption key follow these steps:
- Sign in to Microsoft Dynamics CRM as a user with the system administrator security role.
- Go to Settings > Data Management > Data Encryption.
- In the Data Encryption dialog box, select Show Encryption Key, in the Current encryption key box select the encryption key, and copy it to the clipboard.
However, if the Microsoft Dynamics CRM website is not configured for HTTPS/SSL, the Data Encryption dialog box will not be displayed.