Office 2013 Keeps Prompting Proxy Authentication

I am using Microsoft Office 2013 behind company proxy. Each time I launch an office application it will keep on prompting me for proxy authentication on the following domains.

this computer is in domain and I am login with domain username and password.

February 20th, 2013 11:22am

I have this same issue and it is HUGELY annoying.  I will uninstall 2013 completely if I cannot find the way to disable this "feature".  I will NEVER use sky drive and have NO use for internet, so Office does NOT need my proxy settings.  Stop the insanity!

- btw - I did go into options and tell Office not to connect to the internet and I STILL have this issue.  Puts me in a bad mood every time I open an office product.

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February 20th, 2013 5:00pm

@The Falconer, I had the same COA and it still happens, but only when the "New" pane/windows of any Office app is opened.

We have several restrictions on the proxy server, words in the URL, complete domains and so on, so certain document models wouldn't load (the CV model is one) and the credentials window pops up, so I'd ask you IT team to take a look at the proxy logs to check what's being blocked and probably solve this problem.

February 21st, 2013 5:42pm

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April 4th, 2013 10:45am

April 4th, 2013 10:46am

Did this work for anyone? Or has anyone found a solution? 


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September 5th, 2013 12:19pm

It does not work for me.

I'm on an enterprise domain network.

We do not need SkyDrive and internet for office apps.

Uncheck this option does not solve the issue, it's still prompting us to enter proxy credentials.

I'm going to search on a regkey to find a way to stop this s****

September 24th, 2013 7:56am

Has anyone made any further progress on this.   I am having the same issue with Office 2010, and have been unable to resolve the issue.  I have adjusted the settings in the Privacy options.


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October 23rd, 2013 5:14pm

I'm not sure if you are still having the issue, but I found that you can get around this error at program start-up by going into File, Options, General, Start Up Options, and the removing the checkmark that says Show the Start screen when this application starts(Show the New template gallery when starting Publisher).  That setting is available on Word, Excel, PowerPoint, Publisher, and Visio. There are group policy templates that allow you to disable this for all Office 2013 products if you are on a domain.
November 6th, 2013 8:00pm

THis is a crap solution that requires you to AT LEAST ONCE click through all the prompts. I am on cancel number 38 by actual count wtih no end in sight. THIS IS A BUG, it needs fixing.
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February 10th, 2014 4:10pm

This makes no difference. Even if "Allow Office to connect to the Internet is NOT ticked it still prompts for proxy credentials.

This in itself makes no sense! It is trying to connect to the internet when clearly it should not.


Under Options, General: Untick "show the start screen when this application starts" - this seemed to work for just starting an office application on its own (no document or file opened), but made no difference when opening an office document using an Office 2013 application.

Under Options, Save: Tick "Don't show the Backstage when opening or saving files" and UNtick "Show additional places for saving, even if sign-in may be required". This last seems to have done the trick so far...

February 14th, 2014 4:24am

What proxy server are you using?

Have you tried this?

1. In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
If it doesnt exist, create a DWORD value named LmCompatibilityLevel and set the value to 1 to use LM NTLM and NTLMv2.

2. Reboot

This was a solution I found to allow windows updates to work through a squid proxy server and appears to have resolved the Office 2013 computers on my network.

The issue described is due the authentication NTLM of Windows.

Hope it helps.


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August 25th, 2014 3:25am

It's actually easy... go to your browser, for me it was Internet Explorer...go to Settings>>Internet options>>Connections>>LAN settings>>Advanced. Post the following in the space provided below where it says Do not use proxy...:;;

use a proper separator i.e. ; or , according to your browser needs. 

this solution is taken from


November 21st, 2014 5:41am

Please Microsoft can you fix this stupid problem properly. The suggested solution only work when you open a second window. Once you close everything and start a brand new window it will start again.

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March 3rd, 2015 9:39pm

None of the above will work. <o:p></o:p>

The authentication on the proxy server needs to be changes to:NTLM<o:p></o:p>

Also note if the proxy server is setup with Basic or Digest authentication you will continue to get these popups, not One Drive will also not work.<o:p></o:p>

June 9th, 2015 7:16pm

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