This is a migrated thread and some comments may be shown as answers.

cannot sign back to office 365 when Fiddler is running

1 Answer 475 Views
Windows
This is a migrated thread and some comments may be shown as answers.
Zbigniew
Top achievements
Rank 1
Zbigniew asked on 22 Jul 2020, 06:28 PM
Hi Team,

I am having issues when running Fiddler in order to analyze the traffic that is made between Office 365 apps and authentication service from Microsoft.
Basically when Fiddler in running in non-browser mode and after I sign out from Word and want to sign in again I am getting error 0xCAA70004 which indicates there's no internet. The intranet pages are also affected as they don't load. We got a proxy setup. I did setup a proxy server settings in LAN settings on IE however I still get the same result. I did set the proxy settings manually in Fiddler under the tools>options>Gataway and checked under "show current gateway Info" which shows our proper proxy details. Still I cannot get any of the office apps to authenticate. Act as system proxy is enabled under the Connections tab and the Root certificate is enrolled. Decryption from HTTPS in enabled and set to "from all processes". Protocols are set for tls1.1 and tls1.2
Can you please advise how to fix this issue?Should Fiddler be bypassed for Office 365?

Many thanks in advance for the advice and reply.

1 Answer, 1 is accepted

Sort by
0
Nick Iliev
Telerik team
answered on 23 Jul 2020, 06:57 AM

Hello Zbigniew Bajer,

 

There are some known issues with some Microsoft products working alongside FIddler including the issue you are facing with Office365. One possible workaround is to stop the Fiddler capturing (this will reset the proxy settings), close Fiddler, re-authenticate in Office365, and the start Fiddler and start capturing. Another solution would be to bypass Fiddler for some specific Office365 URLs - instructions on how to achieve that can be found here.

 

Regards,
Nick Iliev
Progress Telerik

Tags
Windows
Asked by
Zbigniew
Top achievements
Rank 1
Answers by
Nick Iliev
Telerik team
Share this question
or