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OWA login - Get Windows dialog box instead of standard OWA login screen

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OWA login - Get Windows dialog box instead of standard ... - 7.Jun.2007 12:38:28 AM   
srace

 

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Joined: 7.Jun.2007
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This is an SBS 2003 server, SP1.  Not sure what settings have been changed, but the users cannot use "outlook over http"....it appears to be because when you load the webmail, a pop-up box comes up asking for the domain username and password...the title is "Connecting to owa.mydomain.com" and it asks for username/password.  If you enter username and password into that popup, your Inbox comes up and all looks good.

I'm trying to figure out how to return this config to the standard login screen and not get the pop-up login screen.  I've compared settings and permissions to a standard 2003 SBS install, and I haven't found any inconsistenties.  Any idea what I might check?  Thanks!!
Post #: 1
RE: OWA login - Get Windows dialog box instead of stand... - 7.Jun.2007 3:04:25 AM   
sergebsn

 

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Joined: 10.Jan.2007
From: Russia
Status: offline
What's about - ESM-Protocols-HTTP-Virtual Server

The 'Settings' - what do you have?

_____________________________

Best Regards,
Serge Borisichev

P.S.:Sorry, for my English

(in reply to srace)
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RE: OWA login - Get Windows dialog box instead of stand... - 7.Jun.2007 8:18:24 AM   
leederbyshire

 

Posts: 1356
Joined: 4.Jan.2006
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It sounds like either:
1.Forms-based Authentication is turned off on your Exchange Virtual Server.
2.You removed the requirement for SSL on your Exchange VDir in IIS Manager.  If you don't use SSL, then the FBA screen will not appear.

_____________________________

Lee.
___________________________________

Outlook Web Access for PDA and WAP:
www.leederbyshire.com
___________________________________

(in reply to srace)
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RE: OWA login - Get Windows dialog box instead of stand... - 8.Jun.2007 3:03:34 PM   
jdascott

 

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Joined: 20.Dec.2005
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You both are correct, thank you for tips. Yes, the checkbox to "Use forms based authentication" is unchecked, and if I check it, it says that SSL needs to be enabled, which isn't yet (which is another problem).  So...I'm thinking I can get an SSL certificate installed, check the box to require SSL in the properties of the ExchWeb folder in IIS, then enable the forms based authentication?  Thanks for the help!!

(in reply to srace)
Post #: 4
RE: OWA login - Get Windows dialog box instead of stand... - 8.Jun.2007 8:13:41 PM   
leederbyshire

 

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Joined: 4.Jan.2006
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Yes.  If you check the checkbox now, then FBA will not appear until you use SSL.  You don't have to actually /require/ SSL, it's just that your users will only see the FBA login page if they use https:// URLs.  I only mention that because some people like to force SSL for external use by only passing port 443 at the firewall.  External users will the see the FBA screen. They then allow internal users to use plain old http, but they would not then see the FBA screen.  This is the difference between requiring and not requiring SSL.  Just because it's not required doesn't mean it can't be used.

_____________________________

Lee.
___________________________________

Outlook Web Access for PDA and WAP:
www.leederbyshire.com
___________________________________

(in reply to jdascott)
Post #: 5
RE: OWA login - Get Windows dialog box instead of stand... - 11.Jun.2007 7:00:09 PM   
jdascott

 

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Joined: 20.Dec.2005
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So, I am understanding it correctly that the using of HTTP or HTTPS will determine how the login data is sent to the server?  So, outside the firewall, if someone connects to http://owa.mysite.com and gets the pop-up, data there is still sent plain-text, while if the FBA was up and they used the http://owa.mysite.com link to access it, they'd still pass it in plain text?

Thanks for all the answers, this has been very helpful!

(in reply to srace)
Post #: 6
RE: OWA login - Get Windows dialog box instead of stand... - 11.Jun.2007 10:10:04 PM   
leederbyshire

 

Posts: 1356
Joined: 4.Jan.2006
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The server reacts differently if https is used.  If https is not used, then it will not use the FBA login page at all, but will send a normal login challenge.  Without https, if Integrated Auth is enabled, and IE is used as the client, then the credentials are encrypted, but the actual email pages are not.  If only Basic Auth is used, or a non-MS browser is used (only IE 'understands' Integrated Auth), then then credentials are sent Base64 encoded (which is not an encryption method), and again the email pages are in plain HTMl source.  If you use https (ssl) then the FBA login page will appear, and the entire session (credentials, pages, everything) is encrypted.

_____________________________

Lee.
___________________________________

Outlook Web Access for PDA and WAP:
www.leederbyshire.com
___________________________________

(in reply to jdascott)
Post #: 7
RE: OWA login - Get Windows dialog box instead of stand... - 15.Nov.2007 8:00:35 AM   
ceisi

 

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Joined: 15.Nov.2007
Status: offline
i have nearly the same issue.
can you exactly tell me, where i can find this options?

(in reply to leederbyshire)
Post #: 8

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