You can change the encryption used for data by choosing another encryption certificate.
To change the encryption certificate
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In the API Server's installation directory, open the web.config file. NOTE: If the file is encrypted, decrypt it first. 
- 
Change the value of the certificatethumbprint property to the thumbprint of the certificate you want to use. 
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Save your changes to the file. NOTE: If the file was encrypted beforehand, encrypt it again. 
