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Hi All,
Currently we had a problem in some of our client machine while accessing Configuration Manager Console.
When user accessing CMC (Configuration Manager Console), sometimes this pop-up appear "Configuration Manager cannot connect to the site" (Attahed 1.png). We ensured there's no connection issue while this issue happened.
We dig deeper and also captured some network pcap while trying to reproduce this issue. Somehow while reproduce the issue we found client machine sometimes not sending the "AuthInfo SPNEGO" in RPC network packet. (Attached 2.png)
Details of our environment:
Kindly advice and appreciate for all of your response.
Thank you
Have you experienced similar issue in CMC?
Also, is there any specific condition when CMC not sending the packet with AuthInfo? Is missing AuthInfo in network packet can caused this kind of issue?
Hi, @Yudhi Laksana
Thank you for posting in Microsoft Q&A forum.
You may try to open SSMS and connect to the site database, then navigate to <Server>/Security/Logins, check if the computer account is there.
If not, add it. If yes, remove it and add it back with the same setting. Then check the results.
For the details:
https://learn.microsoft.com/en-us/archive/msdn-technet-forums/6c55a1c8-64c7-4720-bc8d-a4ee25856b1e
Also, we may check SmsAdminUI.log and Smsprov.log for more details:
https://learn.microsoft.com/en-us/mem/configmgr/core/plan-design/hierarchy/log-files#BKMK_ConsoleLog
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Add comment".
Hi @AllenLiu-MSFT , Thanks for your answer!
I'll check for SSMS. However, if this issue does not happen every time, could it also be caused by a misconfiguration in SQL?
From SMSAdminUI.log, I see many logs about not being able to connect to the SMS server. Below are some snippets from my SMSAdminUI.log:
[1, PID:9456][10/12/2024 08:46:15] :System.Net.WebException: 未能解析此远程名称: '<redacted>'
[1, PID:9456][10/12/2024 08:46:15] :Failed to get a response for OData GET request: https://<redacted>/AdminService/v1/ConsoleExtensionMetadata
[1, PID:9456][10/12/2024 08:46:15] :Error getting custom console extensions IDs, versions and names using Admin Service: Unknown
[1, PID:9456][10/12/2024 08:46:16] :System.Runtime.InteropServices.COMException\r\nRPC 服务器不可用。
\r\n 在 System.Management.ThreadDispatch.Start()
在 System.Management.ManagementScope.Initialize()
在 System.Management.ManagementObjectSearcher.Initialize()
在 System.Management.ManagementObjectSearcher.Get()
在 Microsoft.ConfigurationManagement.ManagementProvider.WqlQueryEngine.WqlQueryProcessor.ExecuteQuery(String query, Int32 blockSize, Dictionary`2 contextInformation)\r\n
[1, PID:9456][10/12/2024 08:46:16] :Notification Banner: RPC 服务器不可用。
Attached also SMSAdminUI.log for one day (SMSAdminUI-10122024.log)
Any advice? Thank you
Hi, @Yudhi Laksana
You mean this is a random issue, right?
By checking the log, we can see RPC server is unavailable, we may check if the required ports like TCP 135, UDP 135 and dynamic ports from console to SMS provider and site server is normal.
For more reference:
https://learn.microsoft.com/en-us/archive/msdn-technet-forums/a4d4283c-252d-4912-a036-dc593225bb39
Hi @AllenLiu-MSFT ,
So generally speaking, "RPC server unavailable" is indicate the networking issue?
Actually we had a ZTNA product that installed on our machine, without using that application this issue isn't happen at all but while using that software this issue is sometimes happen.
We had no clue because this issue isn't always happen even when we use our ZTNA product.
In the PCAP I shared earlier, the one without "AuthInfo" was captured while we were testing open the CMC while using ZTNA software
So, that is a random issue when we use the ZTNA product, then we should avoid opening the console when using ZTNA product.
Apply the latest hotfix for the SCCM site. I experienced this issue previously, and applying the hotfix resolved it. 🤓