SSL Certificate SHA2

My users use an application that pulls data from a Bloomberg terminal and parses the data, and formats it. The vendor of the application sent an email they are upgrading the SSL certificate to use SHA-2 (SHA-256) instead of SHA-1 encryption. They are saying the IT team should ensure the SSL certificate is upgrade to use SHA-2.  What needs to be done?
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MASEE Solution Guide - Technical Dept HeadCommented:
You just re-key the certificate as almost all the new 3rd party CA certificates are SHA-2
You have to generate a CSR from your server and submit the CSR in your 3rd party CA portal for rekey/reissue. You are done.

Please let me know the 3rd party CA name
btanExec ConsultantCommented:
Need to send a Certificate Signing Requests (CSR) to the issuance of the SSL certificate to change SHA1 to SHA2 signature. For instance for CA such as DigiCert, the summary of activities can include
- Generate new CSR for any certificates still using SHA-1 on the server
> Depends on the appl SSL certificates already installed, likely is your Web tier or app tier SSL certificate
- Replace your existing SHA-1 certificates with a SHA-2 certificate, which you can
> reissue the certificate, or
> renew the certificate, or
> purchase a new certificate
- Install New SHA-2 Certificates (along with any additional intermediate certificates required which you should already has if going back to the same CA)
- Verify and Test Certificate Installation
> CA may have diagnostic tool to verify this. For Digicert, they has free DigiCert SSL Installation Diagnostics Tool to find problems, as well as DigiCert Certificate Inspector to check also other potential vulnerabilities based on how configured the certificates are configured.

Key is find all the SHA1 SSL certificate to the appl and conduct the review above mentioned...

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