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Posted by: andrewt2m - 22 December 2021 13:13:25
After replacing certificate we saw this on EX2019 DB box: Log Name: Application Source: MSExchange Front End HTTP Proxy Date: 22/12/2021 13:08:39 Event ID: 2001 Task Category: Core Level: Error Keywords: Classic User: N/A Computer: exserver.domain.local Description: [Owa] Failed to load SSL certificate. Event Xml: 2001 2 1 0x80000000000000 3495586 Application exserver.domain.local Owa Log Name: Application Source: MSExchange Front End HTTP Proxy Date: 22/12/2021 13:08:59 Event ID: 2001 Task Category: Core Level: Error Keywords: Classic User: N/A Computer: exserver.domain.local Description: [Ecp] Failed to load SSL certificate. Event Xml: 2001 2 1 0x80000000000000 3495590 Application exserver.domain.local Ecp

Posted by: andrewt2m - 22 December 2021 13:13:25

After replacing certificate we saw this on EX2019 DB box: Log Name: Application Source: MSExchange Front End HTTP Proxy Date: 22/12/2021 13:08:39 Event ID: 2001 Task Category: Core Level: Error Keywords: Classic User: N/A Computer: exserver.domain.local Description: [Owa] Failed to load SSL certificate. Event Xml: 2001 2 1 0x80000000000000 3495586 Application exserver.domain.local Owa Log Name: Application Source: MSExchange Front End HTTP Proxy Date: 22/12/2021 13:08:59 Event ID: 2001 Task Category: Core Level: Error Keywords: Classic User: N/A Computer: exserver.domain.local Description: [Ecp] Failed to load SSL certificate. Event Xml: 2001 2 1 0x80000000000000 3495590 Application exserver.domain.local Ecp

Posted by: andrewt2m - 22 December 2021 13:47:48
OK so there were a few issues here, firstly the Exchange Back End website had lost it's certificate association which stopped all comms with the Exchange server including powershell: [img=https://www.sircles.net/downloads/images/ex2019cert.png]Exchange 2019 back end certificate error[/img] And so we could not change anything. We had to repair the association with the site in the IIS manager bindings: [img=https://www.sircles.net/downloads/images/ex19-1.png]Exchange 2019 back end certificate error[/img] [img=https://www.sircles.net/downloads/images/ex19-2.png]Exchange 2019 back end certificate error[/img] [img=https://www.sircles.net/downloads/images/ex19-3.png]Exchange 2019 back end certificate error[/img] Once the certificate was reinstated, we ran IISReset on the server and then we regained access to Exchange PowerShell We could then re-associate all of the services with the correct certificate using: Enable-ExchangeCertificate -Thumbprint [Thumbprint] -Services POP,IMAP,IIS,SMTP All we had to do after that was to re-associate the relationship with our edge-transport server as we use one, but otherwise you should be done. \:d/

Posted by: andrewt2m - 22 December 2021 13:47:48

OK so there were a few issues here, firstly the Exchange Back End website had lost it's certificate association which stopped all comms with the Exchange server including powershell: [img=https://www.sircles.net/downloads/images/ex2019cert.png]Exchange 2019 back end certificate error[/img] And so we could not change anything. We had to repair the association with the site in the IIS manager bindings: [img=https://www.sircles.net/downloads/images/ex19-1.png]Exchange 2019 back end certificate error[/img] [img=https://www.sircles.net/downloads/images/ex19-2.png]Exchange 2019 back end certificate error[/img] [img=https://www.sircles.net/downloads/images/ex19-3.png]Exchange 2019 back end certificate error[/img] Once the certificate was reinstated, we ran IISReset on the server and then we regained access to Exchange PowerShell We could then re-associate all of the services with the correct certificate using: Enable-ExchangeCertificate -Thumbprint [Thumbprint] -Services POP,IMAP,IIS,SMTP All we had to do after that was to re-associate the relationship with our edge-transport server as we use one, but otherwise you should be done. \:d/

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