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PriyaJayaraman-7005 avatar image
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PriyaJayaraman-7005 asked LucasLiu-MSFT commented

Renew Self signed certificate with sha256 algorithm

Hello,
Please advice on ways to Renew exchange Self signed certificate with sha256 algorithm.
We do not have a CA server in place.
Advice if New-ExchangeCertificate command will automatically generate sha256 algorithm certificate.
Get-ExchangeCertificate -Thumbprint <Thumbprint> | New-ExchangeCertificate [-Force] [-PrivateKeyExportable <$true | $false>]

Cheers
Priya

office-exchange-server-administration
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Hi @PriyaJayaraman-7005

Any update about your issue?

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AndyDavid avatar image
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AndyDavid answered

Create in the Windows MMC, then assign the services to it and ensure its set correctly on the Exchange BackEnd

http://thewindowsupdate.com/2019/03/18/sha-256-self-signed-certificate-for-windows-server-2012-r2/

https://ehloergosum.com/2020/01/25/renewing-that-pesky-microsoft-exchange-certificate/

I would test this in a lab first.

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joyceshen-MSFT avatar image
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joyceshen-MSFT answered LucasLiu-MSFT commented

Hi @PriyaJayaraman-7005

Agree with the suggestion above from Andy, you could perform the operation in MMC, the certificate request created by Exchange PowerShell using SHA1 by default.

You could refer to the links which give step-by-step guide about this:

Create a CSR with SHA256 signature algorithm
SHA-256 Self Signed Certificate for Windows Server 2012 R2

Here is also an article introduces about How to Create a Self-Signed Certificate in Windows with PowerShell?

Please Note: Since the web sites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.


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Hi @PriyaJayaraman-7005 ,
Do suggestions above help?



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