"This service is no longer available" error when deleting messages in OWA

Aleksandr Alekseev 16 Reputation points


For a few days users with mailboxes on Exchange Server 2010 in a network with Exchange 2016 are reporting errors when attempting to move or delete messages while in OWA. The error reads: "This service is not available". OWA is proxied by the Exchange 2016 server. What I noticed is that, when you use direct Exchange 2010 URL for OWA, deleting messages works fine. The error is fired whenever users access OWA externally via the Exchange 2016 OWA proxy.

Coincidence or not, this started happening after Exchange 2016 had the CU23 installed last weekend.

There don't appear to be Google search results concerning this issue. Could it be something new in the wild?

Anyone has any ideas how to troubleshoot?

Thank you


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5 answers

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  1. Amit Singh 4,761 Reputation points

    Please use the below command to check the authentication methods you have configured for EWS.

    Get-WebServicesVirtualDirectory | fl *auth*

    According to the error message, we can try to recreate EWS and OWA virtual directories to test.

    In addition, I have found a similar thread for your reference: https://social.technet.microsoft.com/Forums/exchange/en-US/1c5758d8-bf2c-4b24-8959-1bdcb9734b75/owa-2010-unable-to-delete-emails?forum=exchange2010

  2. Jame Xu-MSFT 4,166 Reputation points

    Hi @Aleksandr Alekseev ,

    You could check the proxy settings after the update, and also check your virtual directory configuration. Here is a similar case you may refer to: https://www.reddit.com/r/exchangeserver/comments/10dawma/exchange_owa_cannot_delete_items/

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  3. Jakub Podsiadło 0 Reputation points

    Exactly the same case. I have verified the suggestions described above.

    • TLS 1.2 is enabled.
    • SSL Binding on, with valid certificate on Default Web Site

    There are no errors in HTTPProxy logs on Exchange 2016

    There are no errors in the IIS logs on Exchange 2010

    Interestingly, I can delete and move messages in OWA Lite.

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  4. Aleksandr Alekseev 16 Reputation points

    This issue is still at large. Wondering if anyone managed to find a workaround aside from accessing internal URLs of 2010 servers directly via their local FQDN, bypassing the 2016 OWA Proxy?

    In our organization we are still far from moving every mailbox over to the 2016 server although this is the ultimate goal. The fix is required as an interim solution.

    Thank you !

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  5. ZacZG 1 Reputation point

    Hi, I have the same error with a fresh installation of exchange 2016 in coexistence with exchange 2010. Everything works fine except for deleting the e-mails of users who are still on the 2010 version, and the invalid canary error appears in ecp access? When accessing OWA 2010 directly without a proxy, everything works normally. The problem occurs only when the user accesses from the proxy Exchange 2016 to 2010? Has anyone found a solution in the meantime?

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