Unable to connect to the sccm site

yi huang 1 Reputation point

I am having issues connecting using the remote sccm console inside of SMSAdminUI.log I see the following error: System.Runtime.InteropServices . comexception  R  nrpc server is not available. (exception from HRESULT:0x800706BA )\At System.Runtime.InteropServices . Marshal.ThrowExceptionForHRInternal (Int32 errorCode, IntPtr errorInfo) In System.Management.ManagementScope .InitializeGuts(Object o) In System.Management.ManagementScope .Initialize() In System.Management.ManagementObject .Initialize(Boolean getObject) In System.Management.ManagementObject .InvokeMethod(String methodName, ManagementBaseObject inParameters, InvokeMethodOptions options) In Microsoft.ConfigurationManagement . ManagementProvider.WqlQueryEngine.WqlConnectionManager .ExecuteMethod(String methodClass, String methodName, Dictionary`2 methodParameters, Boolean traceParameters)\r\n Microsoft.ConfigurationManagement.ManagementProvider.SmsConnectionException\r\nThe ConfigMgr console could not connect to the ConfigMgr site database. Verify that this computer has network connectivity to the SMS Provider computer and that your user account has Remote Activation permissions on both the ConfigMgr site server and SMS Provider computers. For more information, see "How to Configure DCOM Permissions for Configuration Manager Console Connections" in ConfigMgr Help.\r\n at I can't connect to the site through configuration manager

Microsoft Configuration Manager
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  1. Amandayou-MSFT 11,056 Reputation points

    Hi @yi huang ,

    0x800706BA = "The RPC server is unavailable" usually indicates a networking issue. Something is blocking the remote connection.

    Here is a thread with similar issue and the issue turned out to be firewall related with outbound traffic inspection blocking some of the communication. Hope it helps for you.

    Besides, please check if the required ports like TCP 135, UDP 135 and dynamic ports from console to SMS provider and site server is normal.

    Configuration Manager console -- > Site server

    Configuration Manager console -- > SMS Provider

    Here is the article about accessing denied due to DCOM permissions.
    Note: This is non-official Microsoft article just for your reference.

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