I'm having a problem with Outlook 2013 asking for my credentials a few times a day for no apparent reason. Some info on my setup...

CLIENT

Windows 7 Professional SP1 64 bit, fully patched

Office 2013 Pro Plus 32 bit, fully patched (has there even been any patches released yet?)

Outlook auto-configured to Exchange during setup.

Online Archive setup with server

Connected via gigabit ethernet on same network and domain as Exchange server.

SERVER

Exchange 2010 SP2, fully patched.

One server, holds all roles.

I have zero clue as to why I'm getting popped for credentials. This did not happen prior to my upgrade to Office 2013. I was previously using Office 2007 Pro Plus.

My credentials are always accepted, never a problem putting them in.

Thanks in advance!

When does the password prompt window pop-up? the beginning of Outlook launching or Outlook is running? Have you configure other email account in this Outlook profile?

You'd better capture the windows of password prompt and post here to get the more clue.

In generally, the likely reason why the password prompt for your Exchange account is because you are enable Outlook Anywhere and the authentication settings have been set to Basic Authentication. Unless you can switch to using NTLM Authentication.

Another reason for this issue is because the Outlook setting is changed after upgrade. Please check the setting as the following screenshot:

In addtion, please create a new outlook profile and test the result.

Cheers,
Tony Chen
Forum Support
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• Proposed as answer by Geomair Friday, November 22, 2013 12:26 PM

To answer your questions....

1. The password prompt pops up BOTH when Outlook is launched AND after Outlook is running. Neither always occurs though. Sometimes is doesn't pop upon launch, and sometimes it only pops up at launch.

2. I will capture the window next time it pops up.

3. I have changed the authentication to NTLM instead of Basic Authentication. We'll see if this makes a difference.

4. The check box for "Always prompt..." was already checked. I left it as such.

5. I will wait to see if the change to NTLM authentication makes the difference. If if doesn't, I will screenshot the password prompt, post it here, and recreate my Outlook proflie.

Thanks you for your help. I will let you know either way where things go from here.

• Marked as answer by Tony Chen CHNMicrosoft contingent staff, Moderator Thursday, November 22, 2012 1:19 AM
• Unmarked as answer by Tom Kovacs Monday, November 26, 2012 2:12 PM

Hi Tom, any update?

Hi,

I'm marking the reply as answer as there has been no update for a couple of days.

If you come back to find it doesn't work for you, please reply to us and unmark the answer.

Cheers,
Tony Chen
Forum Support
________________________________________
Come back and mark the replies as answers if they help and unmark them if they provide no help.
If you have any feedback on our support, please contact tnmff@microsoft.com.

I'm having the same issue.  As are a couple of my co-workers.  One difference, we're using Office 365 with Office 2013.  

We had no problems prior to the upgrade to Outlook 2013. 

We are seeing the same issue as Tom...we get prompted for credentials....Outlook is still open and receiving emails just fine in the background.  

I can come back after 24+ hours of ignoring the prompt and all my folders are up to date but the window is there asking for my password.

I don't have the "Always prompt" box checked either.

Actually, something that 2013 did through the set up was to add the details for Outlook anywhere.

I have unticked this (my machine is static) and it appears to have solved the problem.

• Proposed as answer by Supa-Dan Friday, December 28, 2012 11:23 AM

Any updates on this?

unticking Exchange proxy settings does not sounds solution for me, because that setting is useful if a user has laptop and wants to connect Outlook client outside office. We are having the same problem for pop-up credentials after upgrading outlook 2010 client to 2013 version.

We have server Exchange 2010 SP2

Solution on the client side is to turn off "Download shared folders" wich is in

File -> account settings ->account settings -> Edit.. (account) -> More settings... (button on the bottom) -> Advanced (tab) -> Untick "Download shared folders"

• Proposed as answer by Tony Chen CHNMicrosoft contingent staff, Moderator Tuesday, February 19, 2013 1:27 AM

I am having a similar issue, and I can see that it is having trouble with the OAB and EWS paths.  (I can see this through my ISA 2006 server) I have tried some of the suggestions from previous post, but they have not worked with the exception of clearing the Http connection which limits the laptop users.

I have also found that the problem does not happen on systems that had an upgrade from 2010 to 2013, but it happens on systems that have been imaged and Outlook 2013 installed or 2010 uninstalled and 2013 installed.

Has anyone had any luck?

Same here.

The problem happens only on 2013 clients when the client's wants to download OAB.

I have the same question for Internet Explorer 6, 7 and 8

http://social.technet.microsoft.com/Forums/en-US/ieitpropriorver/thread/c379f745-2215-463a-b6cb-aa032e803970/#c379f745-2215-463a-b6cb-aa032e803970

I am hoping an solution was found by this time, but because I was having a similar issue, and did find a solution, I wanted to post so others get the information.

My configuration is a slightly different (Win 7 and Win 8, Office 365 (for sharepoint and exchange), Office 2013). I went to the account data files and deleted the SHAREPOINT LISTS, which is for the address book and calendars. I believe the issue was a rogue calendar entry trying to sync and causing repeated credential login requests. With removing the SharePoint list from local computer all login requests stopped. Address book, email, and calendars all were unchanged.

I have been testing and testing also for days, then waiting for any responses to other people's questions on other places as well.

After some time started my own tries again.

Now I fixed my issue - don't fully comprehend it. But anyway here comes the solution that worked for me (and hopefully for more of y'all)...

Go to the Exchange account from within Outlook, click special settings, tab connection. Open up the button proxy settings, UNtick options 3 and 4 (connections with HTTP/then TCP/IP). Make sure to UNtick both.

Press OK, Hit Save and OK again. Press NEXT and close the screens.

Logout from Outlook. LOG OFF your RDP session if you're in one. Restart the RDP session after some 15 seconds. Or start Outlook if you were only in Outlook.

My issue was then solved.

In our case the solution was strange.

With MS SUPPORT we have tried several things (deleting and recreating virtual directories: autodiscover, webservices, oab...). Didn't help.

After that we have realized that it must be some OUTLOOK 2013 client vs. TMG loop thing (strange thing that this was not happening to Outlook 2010 clients, probably 2013 uses a different way to connect whether the client is inside LAN or not).
In our internal DNS (inside LAN) we had internal A record for OWA which was pointing to DMZ (TMG listener for OWA).
This caused a "loop" and pop-up credentials in outlook 2013 clients.

* After changing internal A record for OWA to point to Exchange2010 IP in LAN,
* Doing redirection for owa.company.com to owa.company.com/owa
The problem for credentials disappeared.

Very helpful links for redirection OWA.
http://hardanswers.net/redirect-owa-exchange-2010
http://www.ehloworld.com/186
http://technet.microsoft.com/en-us/library/aa998359.aspx

We have manage to KILL that nasty pop-up window for credentials inside OUTLOOK 2013 clients. For OWA redirection I recommend you to use Powershell scripts from this site (http://www.ehloworld.com/186).
If you have already done some manual changes for OWA redirection thru IIS on Exchange, double check if other virtual folders have redirection enabled. They must not have it (except for the default web site).
In our case we needed to uncheck it for Exchange folder on IIS, because OWA started to crash.

I think modifying settings on OAB folder were also necessary because of the redirection.
We needed to add Authenticated Users and give them read permission on Exchange OAB folder (Default location: C:\Program Files\Microsoft\Exchange Server\<version>\ClientAccess\oab). (http://technet.microsoft.com/en-us/library/aa998359.aspx).

With best regards,

Wouter: "Go to the Exchange account from within Outlook, click special settings, tab connection.", wher

 I`ve been losing sleep thanks to this credential problem (asking for password) for a week now. I migrated a client to Exchange On-line (office 365) and two stations have Office 2007 with mutliple profiles. The prompts not only ask for the password, but the username that popped up was the wrong one consistantly. If I asked for Mr. X`s profile I`d see Mr. Y and so forth. 

Thanks to the information above I was able to finally (keeping my fingers crossed it still works in the morning) get the prompt to stop asking. I basically went into the ADVANCED tab (under each account) and unselected to load shared files/Data. (I`m translating since the outlook was in French). That did it. Now to see what impact this has.

I hope this helps someone.

Regards,

Bob

We also had a different number of PC's with issues.

I have selected under the Advanced tab to SELECT to USE CACHE. Just that, no other ticks.

Waited a bit for Outlook to start syncing, then Closed Outlook.

After a few seconds (giving it time to close properly) started it up again. Then UNSELECTED to USE the CACHE.

Closed Outlook, started it up. No more issues either. Problem solved.

Just for your info - we use the connection while on Terminal server...

• Edited by Wouter Kloosters Sunday, June 09, 2013 2:16 PM
• Proposed as answer by Germina Monday, June 17, 2013 9:46 PM
• Unproposed as answer by Germina Monday, June 17, 2013 9:47 PM

I also had a user that after upgrading to Outlook 2013 was continuously prompted for credentials while trying to connect to Exchange 2007 trough Proxy from home (while not logged into domain)

- after I tried most posted suggestions with no luck, I was looking at the mailbox properties and under the account tab I noticed that user logon name was different than the e-mail address, tried that one with the correct password and it connected to Exchange and did not prompt again; all the other settings were left untouched

• Edited by Germina Monday, June 17, 2013 10:02 PM

Just had the same issue where Outlook was requesting username / password on startup for a lot of users . Nothing was changed in Exchange, everything was running fine.

Last but not least closing outlook for more than 5 minutes and reopen it worked.

Ok, same issue here. Outlook 2010 works fine, but Outlook 2013 prompts on download of OAB. Meaning..

1. Outlook prompts at startup (or shortly thereafter, usually after 30 seconds or so)

2. Outlook prompts periodically as it attempts to download the OAB

3. You can force the prompt it by selecting "Send/Receive", "Send/Receive Groups", "Download address book"

4. Emails continue to sync just fine even if you never supply credentials.

I can't believe so many have this same problem, yet this remains unanswered this long. Just as others have said, Outlook 2010 works great, so I know there's nothing wrong with Autodiscover or the /OAB virtual directory.

We have a Kemp load balancer in front of our CAS array. I can edit the hosts file to send clients to the CASArray members directly and that does not fix this, so it's not the load balancer.

Using a packet sniffer, It seems as though Outlook 2013 fails to reach the internal URL for /OAB so it attempts the HTTP address, which doesn't support windows auth (basic only for outside). By editing the host file and entering the IP address of the internal CAS array as the External mail host, the prompts stop. So, for example.

External is mail.contoso.com and is 10.10.10.1

Internal is outlook.corp.contoso.com and is 192.168.1.1

If I change the hosts file so that both are 192.168.1.1 it works without the prompt.

I cannot figure out what it is Outlook 2013 doesn't like about connecting to outlook.corp.contoso.com for OAB download, which forces it to go to mail.contoso.com (and therefore, prompts for authentication).

Hi,

I was facing the same issue with all outlook 2013 clients authenticating against exchange 2010 server.

We have Exchange 2010 SP3 with TMG in place.

I found that the rule on TMG that does web services ahtuentication delegation to Exchange was set to "Basic Authentication". When I clicked "Test the rule", it gave me error on OAB virtual directory with the reason.

The authentication on OAB virtual directory on Exchange server was set to "Negotiate/NTLM". Hence, all outlook 2013 users with RPC over HTTP enabled were being prompted for authentication while downloading Outlook address book.

I changed the authentication on exchange OAB virtual directory to "Basic" (in Sync with TMG rule) and it removed the authentication prompt for us.

hope this helps.

Solution on the client side is to turn off "Download shared folders" wich is in

File -> account settings ->account settings -> Edit.. (account) -> More settings... (button on the bottom) -> Advanced (tab) -> Untick "Download shared folders"

On the server side. Probably you have to create shared folder. Maybe someone could reply link to how to.

Okay so how do I get to this magical "Advanced" tab?  I'm not working in Exchange but specifically in Outlook though it doesn't appear to even be syncing my email so I may just scrap it altogether.  

I just want the constant pop up asking for me to select a profile to stop.  Is that what everyone is referring to when they say it is asking for credentials.  Mine is not asking for a password or anything, just selecting a Profile.

Help a non-tech here....

Has anyone investigated a recent hotfix for Outlook 2007/2010/2013?  It appears this is a common issue with Exchange 2010/2013, and seems to have resolve my issues.

http://support.microsoft.com/kb/2839517/en-us

• Edited by C.Leonard Wednesday, September 25, 2013 12:31 AM
• Proposed as answer by C.Leonard Wednesday, September 25, 2013 12:31 AM

Has anyone investigated a recent hotfix for Outlook 2007/2010/2013?  It appears this is a common issue with Exchange 2010/2013, and seems to have resolve my issues.

http://support.microsoft.com/kb/2839517/en-us

Can I ask what is your deployment? We have this issue but with Exchange 2010 SP3 UR2 with Outlook 2010. I have check the OAB / IIS settings, all good. The issue does get resolved when RPC over HTTP is unchecked but our mobile force do not like this! So it makes me think it may be an authentication issue between Basic & NTLM.

Are there any other updates? Has anyone else implemented the KB above?

Cheers,

Dave

Hello.

I have the same problem with Exchange 2010 SP1 + Outlook 2010.

I know this is old and its probably old news and you've solved the problem, but I cant see anywhere that describes this solution.  I have the same setup, exchange 2010 and outlook 2013 with windows 8.   Everything used to work just fine with outlook 2010 and outlook 2007, but with outlook2013 its popup credential time.   I did all the recommended things, delete profiles, recreate virtual directories etc etc etc.   Then something on this page http://msexchangeguru.com/2013/01/10/e2013-outlook-anywhere/  made me look at the IIS\RPC authentication settings. By default its only got basic authentication (thus the popup I guess).   If I change the IIS\RPC settings to Windows+Basic authentication, lo and behold everything works, http/rpc, https/rpc, no changes on the clients.  Internal clients work, internet clients work, all is good with the world.  The only problem is the change is temporary when it is changed in IIS.  To make it permanent you need to use the Set-OutlookAnywhere cmdlet.

The option that worked for me was

Set-OutlookAnywhere -Identity 'MyServer\RPC (Default Web Site)' -IISAuthenticationMethod NTLM,Basic

Give it about 5 minutes to kick in and you should see the authentication methods change in IIS

Hope this at least gives someone a heads up.

• Edited by drd0t Monday, November 11, 2013 10:43 AM
• Proposed as answer by Jacob_Lavender_37934 Monday, January 27, 2014 2:56 PM

IF you are using outlook 2010! Open outlook - File - Account settings - Add and remove accounts and change ... - Double Click on your exchange account - More Settings - 2nd tab is Advanced. 

I was having the same issue. Changing Proxy settings to NTLM seems working. Still monitoring though.

Thanks for the CLUE as to what the issues might be. From your observation, you are letting us know that HTTP is still issue. As stated in my earlier post, it still seems to be pointing to IIS and it's permission settings.

What everyone is wondering is

1.  Why does this only happen to Outlook 2013

2.  Only happens to NEW installs and NOT upgrades.

3.  Seems to be related to connections only involving the HTTP proxy from INTERNAL networks.

Technical Special Note:  What makes this all worse now is that there is a major push that WILL happen with certificates.  The certificates will ONLY have one domain allowed on them and no longer have internal domains.  Making the connectors fail the HTTP requests.  This will mandate major reconfigurations and SPLIT DNS and powershell to get around this.  Head aches are coming if these giants don't get on the same page.

Hi. 

We are experiencing this problem aswell. We have found the cause but no solution yet.

If we untick use cached exchange mode. the password box dissappears 

Does anyone have solutions

Hi,

We have the same problem on some computers and I'm getting really frustrated! None of the things above are helping. Is there really nobody at Microsoft taking this problem serious???

It seems I'm not the only one who has this problem according to this page...

We only have the problem with Office 2013 versions, some are working others not...

I want this fixed because our employees are getting annoyed of this, they can't work when every minute there is a credential popup!

I had this issue too. Turns out the solution was simple.

I didn't think to look, but the username was defaulting to user@domain.com.au and while my password was correct, it would only accept domain\user.

Hope this helps someone with a local domain joined account.

Are the creds for the account in the

Credential Manager

I know this is an old article, but I had the problem, was searching for the answer and ran across it. Here's how I fixed it:

• Proposed as answer by Scott W. Sander Thursday, June 12, 2014 5:35 PM

Thanks for the help but, I tried all this already :-( ... none of these are working.

Any other suggestions?

Ok, I recently had a similar  issue, after a long googling quest.

I ran

Get-ClientAccessServer | fl > c:\cas.txt

 Get-WebVirtualDirectory | fl > c:\web.txt

 Get-OabVirtualDirectory | fl > c:\oab.txt

 Get-OutlookAnywhere | fl > c:\any.txt

 Get-OabVirtualDirectory | fl > c:\oab.txt

 Get-OutlookProvider > c:\provider.txt

 Get-ExchangeCertificate | fl > c:\cert.txt

And then I saw in the get-outlookprovider

Name                                   Server                  CertPrincipalname                         TTL

EXCH                                    Notmymx           mail.mydomain.com                     1

Why there was an entry for a server that was not one of my Exchange servers, is still a question

But after I blanked it out with

Set-OutlookProvider EXCH -server $null  -CertPrincipalName $null

Everything works as expected now.

This resolved the very same issue for me, that a number of users from different companys have came forward with, hope it can help someone.

Close outlook

Go to

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Profiles -
rename Profiles to Profilesold

then restart Outlook and make a new profile.

• Proposed as answer by Declan ONeill Friday, April 04, 2014 10:49 PM

I think modifying settings on OAB folder were also necessary because of the redirection.
We needed to add Authenticated Users and give them read permission on Exchange OAB folder (Default location: C:\Program Files\Microsoft\Exchange Server\<version>\ClientAccess\oab). (http://technet.microsoft.com/en-us/library/aa998359.aspx).

With best re

Folks, it is asinine that responses in these Microsoft forums get marked as answers by anybody other than the person who originally asked the question. THERE IS NO ANSWER IF THEIR PROBLEM WASN'T RESOLVED. You should take a cue from the Stack Exchange sites.

The format on this site is exceedingly non-useful.

• Edited by Alfred F. Neuman Saturday, April 26, 2014 11:35 PM
• Proposed as answer by jlongjr Friday, October 10, 2014 5:45 PM

This also resolved my issue... (Solution on the client side is to turn off "Download shared folders" wich is in

File -> account settings ->account settings -> Edit.. (account) -> More settings... (button on the bottom) -> Advanced (tab) -> Untick "Download shared folders")

Outlook 2013, exchange 2010... asking for password on only SOME clients (others were fine, same software and setup)

could trigger the ask by send and receieve Outlook address book... have no idea why this worked. But as soon as I unticked... launched Outlook, put password in 1 last time and clicked "remember password"... never came up again!!

• Edited by sfabs111 13 hours 49 minutes ago

• Edited by ddd444999 10 hours 1 minutes ago