Once installing Exchange 2016 Cu8 on Windows Server 2012 R2 gave error on OWA.
ECP will work if administrator doesn’t have a mailbox. else even ecp will throw the same error.
An unexpected error occurred and your request couldn’t be handled.
X-ClientId: F554643C29C44C22B59A1DF6E706EB91
request-id bd391bdf-5057-4d0e-8a4d-c5a4f42f22d2
X-OWA-Error Microsoft.Exchange.Diagnostics.ExAssertException
X-OWA-Version 15.1.1415.2
X-FEServer EXCH2016
X-BEServer EXCH2016
Search for Event 2004 to make sure you are having issues with the auth certificate-
Log Name: Application
Source: MSExchange OAuth
Event ID: 2004
Task Category: Configuration
Level: Warning
Computer: EXCH2016.careexchange.in
Description:
Unable to find the certificate with thumbprint A9BBA1727F285CD86EB5785DF47C0A19DA997280 in the current computer or the certificate is missing private key. The certificate is needed to sign the outgoing token.
Solution –
- Creating a new Exch Auth Certificate. Resolved the issue.
Ran below , Saw Auth certificate missing.
Get-ExchangeCertificate (Get-AuthConfig).CurrentCertificateThumbprint
Created a new certificate . Change to your default domain on the end of the command.
New-ExchangeCertificate -KeySize 2048 -PrivateKeyExportable $true -SubjectName "cn=Microsoft Exchange Server Auth Certificate" -FriendlyName "Microsoft Exchange Server Auth Certificate" -DomainName "careexchange.in"
Say no to Replace SMTP Certificate.
Run
Set-AuthConfig –PublishCertificate
Set-AuthConfig –ClearPreviousCertificate
Then run
Get-ExchangeCertificate (Get-AuthConfig).CurrentCertificateThumbprint
verified auth certificate created successfully. Do iis reset. wait for few hours if its a large environment. it should resolve the same.
Run below if still issue persists.
- Locate bin folder and run updatecas.ps1 and updateConfigfile.ps1 resolved for few others.
Other things i have tried –
- Took Backup – Tried Removing msExchCanaryData0/1/2. No luck
- Uninstall and re install the server. No Luck
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