# Configuration Blaize tenant configuration. ## Save the tenant configuration - [POST /v3/configuration](https://developer.zuora.com/zephr-api-reference/zephr-admin-api/configuration/saveconfiguration.md): Creates or updates the tenant configuration. ## Retrieve the tenant configuration - [GET /v3/configuration](https://developer.zuora.com/zephr-api-reference/zephr-admin-api/configuration/getconfiguration.md): Retrieves the tenant configuration. ## Update blacklisted email domains - [PUT /v4/blacklisted-email-domains](https://developer.zuora.com/zephr-api-reference/zephr-admin-api/configuration/updateblacklistedemaildomains.md): Replaces the full list of blacklisted email domains for the tenant. Existing blacklisted email domains are removed and replaced with the values provided in the request body. To remove all blacklisted email domains, provide an empty array. ## Install a tenant - [POST /v3/initialize](https://developer.zuora.com/zephr-api-reference/zephr-admin-api/configuration/installtenant.md): Installs a tenant in Blaize. ## Create a cert - [POST /v3/certs](https://developer.zuora.com/zephr-api-reference/zephr-admin-api/configuration/createcert.md): Creates a cert. ## Delete a cert - [DELETE /v3/certs](https://developer.zuora.com/zephr-api-reference/zephr-admin-api/configuration/deletecert.md): Deletes a cert.