Exchange 2016 Add-in deployment

Sedat Ozdemir 1 Reputation point


When I trying to add a add-in in Exchange 2016 CU7 ECP through the XML file I get an error like below:

Method not found: 'Microsoft.Exchange.WebServices.Data.GetClientExtensionResponse Microsoft.Exchange.WebServices.Data.ExchangeService.GetClientExtension(Microsoft.Exchange.WebServices.Data.StringList, Boolean, Boolean, System.String, Microsoft.Exchange.WebServices.Data.StringList, Microsoft.Exchange.WebServices.Data.StringList, Boolean, Boolean)'.


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. Eric Yin-MSFT 4,386 Reputation points

    Do you have Exchange Web Services Managed API installed on your exchange server? Try to uninstall and reboot.
    CU7 is too old, would you update to latest CU?
    Can you find any related error in Event Log?

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  2. Sedat Ozdemir 1 Reputation point


    I don't have "Web Services Managed API" on my server. I installed "Web Services Managed API 2.2" but nothing changed.
    Also there is no releated error log in Event log, I just find information log.

    Current User: 'S-1-5-21-957102307-2811433378-2019603151-500'
    Exchange Control Panel finished an Async web request in the thread 16.
    Command: 'GetList_PreLoad'