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DominicRussell-7887 avatar image
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DominicRussell-7887 asked DominicRussell-7887 commented

Event 1003 MSExchange Front End HTTP Proxy

Hello,
Our 2013 Exchange server started an error recently, event 1003 MSExchange Front End HTTP Proxy, key certificate is not supported! As a result OWA and ECP are not working anymore.
I tried a different certificate, but the error remain. Which certificate is the error referring to? How to resolve?
Thanks.

office-exchange-server-administration
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JadeLiang-MSFT avatar image
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JadeLiang-MSFT answered DominicRussell-7887 commented

Hi @DominicRussell-7887,

Welcome to our forum!

I tried a different certificate

What's the certificate that you have tried?


Event 1003 MSExchange Front End HTTP Proxy

This error may occur when your Exchange Server OAuth certificate is expired, if you haven't checked it, please first run the following command in EMS to check the status of your OAuth certificate, for more information, please refer to this document: Can't sign in to Outlook on the web or EAC if Exchange Server OAuth certificate is expired .

 (Get-AuthConfig).CurrentCertificateThumbprint | Get-ExchangeCertificate | Format-List

If the command returns an error, or the certificate has expired, it's recommended to follow the document above to create and deploy a new OAuth certificate to the Exchange server.

If that's not your case or you still need further assistance, please feel free to post back.


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Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.

Sorry, I should have mentioned that I already tried that. There was an error on the first command, for which creating a new certificate fixed, but the 1003 event remained.

0 Votes 0 ·

Hi @DominicRussell-7887,

Thanks for your update and sorry for my misunderstandings.

In order to further confirm it, could you please provide us with more information and some relevant screenshots of your error(Notice: Please hide your personal information in the screenshot for security.)

  • detailed error information of your Event 1003

  • relevant error when you log in to owa and ecp

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Once logged in through OWA, here is what is shown :
:-(
Un problème est survenu
Désolé, nous n'avons actuellement pas accès à cette information. Réessayez ultérieurement. Si le problème persiste, contactez votre support technique.
X-ClientId: KVFT - KIEU - AFPT - VNTCGW
X-FEServer: XEN-SRV-2012-EX
Date: 2021-09-14 04:12:46
Moins de détails...
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Event 1003 shows this :

[Owa] An internal server error occurred. The unhandled exception was: System.NotSupportedException: L'algorithme de clé du certificat n'est pas pris en charge.
à System.Security.Cryptography.X509Certificates.PublicKey.get_Key()
à Microsoft.Exchange.HttpProxy.FbaModule.SetCadataCookies(HttpApplication httpApplication)
à Microsoft.Exchange.HttpProxy.FbaFormPostProxyRequestHandler.HandleFbaFormPost(BackEndServer backEndServer)
à Microsoft.Exchange.HttpProxy.FbaFormPostProxyRequestHandler.ShouldContinueProxy()
à Microsoft.Exchange.HttpProxy.ProxyRequestHandler.BeginProxyRequestOrRecalculate()
à Microsoft.Exchange.HttpProxy.ProxyRequestHandler.InternalOnCalculateTargetBackEndCompleted(TargetCalculationCallbackBeacon beacon)
à Microsoft.Exchange.HttpProxy.ProxyRequestHandler.<>c_DisplayClass3f.<OnCalculateTargetBackEndCompleted>b_3e()
à Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(TryDelegate tryDelegate, FilterDelegate filterDelegate, CatchDelegate catchDelegate)

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Hi @DominicRussell-7887,

Are you still researching for it? If you need further assistance, please feel free to post back.

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