Forum Discussion

Copper Contributor

May 19, 2023

Solved

Office365 connectivity test:

when running office365 network checker, I get: "Unable to connect to origin. Inner exception message: The SSL connection could not be established, see inner exception." pops up immediately. 3...

dingxin
Jun 13, 2023
Hi CocoKola, could you please help me with the following 3 questions?

1. Is TLS 1.2 protocol disabled on your machine?
M365 connectivity test tool service requires TLS 1.2 to establish SSL connections. You may check that on your registry editor to see if it's disabled. You could search "Registry Editor" in the taskbar and open it, then navigate to the following path:

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols

TLS 1.2 should be enabled to use M365 Connectivity Test Tool .exe client.

2. Are the following two cipher suite on your machine?

TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)

Cipher suite can also be checked in Registry Editor. The path is:
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\CipherSuite

Those two cipher suites are required by the connectivity test tool service.

3. is .NET Desktop Runtime 6 installed on the machine?

This shouldn't be the reason for the SSL connection failure but I see the exception code 0xe0434352 in the crash log you provided in the comment on May 21st, so just want to double-confirm. Is the crash log below from the issue in the original post saying "Unable to connect to origin. Inner exception message: The SSL connection could not be established, see inner exception" shows when executing the rich client?

If the TLS and cipher suites configuration are unknown, you can also try to enable them on the machine using this software or modify the registry through the Registry Editor and see if the issue can be resolved.

The software is NARTAC which can be downloaded from:
https://www.nartac.com/Products/IISCrypto/Download

No installation requires. Checking the needed TLS protocol and Cipher Suite should work.

CoCoKola

Copper Contributor

May 21, 2023

The Microsoft 365 network connectivity test tool, yes. It does work. When I download the executable THAT app crashes. So I was wrong about access to Microsoft servers as per that tool, but I am trying to troubleshoot my other issues.
here is the crash log:
Faulting application name: Connectivity.52f1ec02-387d-4e1e-bb6d-93bb7da4a004.exe, version: 1.9.79.0, time stamp: 0x641cef7e
Faulting module name: KERNELBASE.dll, version: 10.0.22621.1635, time stamp: 0x61869dd2
Exception code: 0xe0434352
Fault offset: 0x000000000006536c
Faulting process id: 0x0xB848
Faulting application start time: 0x0x1D98B4A5AA3BC3C
Faulting application path: C:\Users\robpr\Downloads\Connectivity.52f1ec02-387d-4e1e-bb6d-93bb7da4a004.exe
Faulting module path: C:\WINDOWS\System32\KERNELBASE.dll
Report Id: a61dc202-efe7-4896-9ec6-d4080a8973cd
Faulting package full name:
Faulting package-relative application ID:

My overall question still stands, diving deeper into what is causing the system not to connect.

I have used tcpip view to verify there are no unanswered connection attempts. Further, Process monitor is showing no issues either.

What am I missing?

CoCoKola

Copper Contributor

May 27, 2023

Microsoft 365 network connectivity test tool- yes.

Anyone have any suggestions?

dingxin
Microsoft
May 31, 2023
Hi CoCoKola ,

When the error pops up, is there any other message below "Unable to connect to origin. Inner exception message: The SSL connection could not be established, see inner exception."?
- CoCoKola
  Copper Contributor
  Jun 01, 2023
  no.
  I launch the downloaded app and I get that pop-up on top of the "onboarding advance tests" , I can click OK and the "onboarding advanced tests" continues to display but nothing else happens.
  waited a day and nothing changed. My only action I can take is click on "cancel".
  - dingxin
    Microsoft
    Jun 02, 2023
    I'm trying to find the root cause of the issue. Could you please help me with the following two questions first?
    
    1. Are you using a proxy to connect to the Internet?
    2. Could you please try downloading the standalone connectivity test tool to see if we could get the whole error message? It works quite similarly to the desktop application but in a console.
    
    The standalone rich client could be downloaded here: https://connectivity.office.com/api/AnonymousConnectivityTest/DownloadStandAloneRichClient
    
    After the download is finished you could simply click it and see if the same issue shows up again and if there's more inner error message. There will be consent required after executing the console.
    
    If you run into some problems when using the standalone rich client, here're guidelines for it: https://learn.microsoft.com/en-us/microsoft-365/enterprise/office-365-network-mac-perf-onboarding-tool?view=o365-worldwide#testing-from-the-command-line
    or you could comment here.
    
    Thanks.