Exchange 2016 ECP Mailbox details error 500

Chriskw29 21 Reputation points


We upgraded recently our Exchange 2016 servers from CU19 to CU20.
When we are trying to allow a mobile device via ECP 'Recipient' 'View Details', we are having an error 500, and sometime a 'HttpException (0x80004005): Request timed out'.
But it does not occur for all users, I tested around 10 users, and I'm facing the issue for only 1. I thought that mayb this user is having too many devices allowed (15), so the request is taking time, and end failing.
When I try via Exchange management shell (get-MobileDeviceStatistic), it is responding, but it's very slow.

Any idea why please?

Thank you in advance.


Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Joyce Shen - MSFT 16,541 Reputation points

    Hi @Chriskw29

    Please try increasing timeout for ECP to resolve your issue above.

    PLease Launch Command Prompt using Elevated Mode and ran the following commands:

    Appcmd add backup "BackupTimeOut"
    Appcmd set config "Default Web Site/ecp" -section:httpRuntime -executionTimeout:2400
    Appcmd set config "Exchange Back End/ecp" -section:httpRuntime -executionTimeout:2400


    Like the discussion in this similar thread: Exchange 2013 Request timeout when trying to edit Distribution group

    Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

    If that does not work your server is most likely overloaded and needs to have more resources allocated to the VM.
    Check for Mailbox Database corruption errors in the event logs on the Exchange server

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