Saturday , May 26 2018

How to Customize the Outlook Web App (OWA)Sign-In page in Exchange 2013

Let us see how to change the Outlook web app(OWA) Logon page in Exchange 2013

All the Outlook Web App logon page /Themes are stored in the Client Access Server


Browse to the Following Location in your Client Access Server

C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\Owa Auth\15.0.516\themes\Resources



Open IIS Manager




Every .gif and .png file inside this folder serves its own purpose

Am going to customize a little which is more adequate to place company logos




For Example :

Take a backup of the files before editing

Am Going to Edit owa_Text_Blue.png and Olk_logo_White.png

Just edited it and replaced the files in the below location
C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\Owa Auth\15.0.516\themes\Resources

Now have a Look at my Customized OWA page


About Satheshwaran Manoharan

Satheshwaran Manoharan is an Microsoft Exchange Server MVP , Publisher of
Supporting/Deploying/Designing Microsoft Exchange for some years.
Extensive experience on Microsoft Technologies.

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  1. Excellent option. Customizing the way we want.

  2. I Love this post!

    • Satheshwaran Manoharan

      Thank you !!

      • Hi,

        I have two client access server and member of DAG To customize name and logo of OWA do i need to change in both client access server in the directories which you given?
        C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\Owa\Auth\15.0.516\themes\Resources

  3. “How to Customize the Outlook Web App (OWA)Sign-In page in Exchange 2013 | CareExchange.
    in _ Satheshwaran Manoharan’s Blog” ended up being a wonderful article, can not help but wait to examine much more of ur blog posts. Time to squander numerous time on the web hehe. Regards ,Dewitt

  4. and how about logon screen’s css file? which css should i edit to change page colors etc.

  5. Great 🙂

    How can I change the OWA after logon? I would add a link to my sharepoint?

    thank you

  6. I am simply trying to find the path of where they add the OWA logo at the top left corner of every theme. In 2010, these folders were easily found to modify the cssprite files. Where is this location in 2013? We need to customize our OWA to reflect our corporate logos throughout each theme.

    • Satheshwaran Manoharan

      As of now. This is the info I have. Its unlike Exchange 2010 , let me update you , when I find something

  7. This is a wonderful post… Jst love the way it explained…. very usefull..

  8. Great article.. i’ve done in my production 🙂

  9. Outlook WebApp can be customized to match your site / Company brand and theme or as your requirement. Please visit to for live demos and submit the request for online quote.

  10. Hi Satheshwaran,

    I am working on the Outlook custom form region. I need some help are you able to help me.

    Please let me know.

    Thank you


  11. Question,

    I have two organizations in my company, for example: one is and the other is and today, with Exchange 2010, I have two CAS Servers, one for each organization, which let me customize the OWA login page differently for each organizations.

    But now, we are planning to move on for Exchange 2013, but this time, using only one server, so how can I customize two different OWA login pages?

    Thanks in advance, it´s a great article you have here!!

    Best Regards,


  12. Hi,
    I want to create a sign in again link in sign-out page of owa. Please help me with this

  13. Florian Schoppmeier

    Great – this was just what i needed. One Question : where can i edit the Descriptions of the logon fields ? It says domain\username but i want the OWA to show E-Mail Address like it was in 2010

  14. Dears,
    I have three OWA for three customers at the same CAS server with their own physical path and dlls, when i create any customization in anyone it reflects to the other two OWAs “for example the logo in the login screen” please help as ASAP,

    • Satheshwaran Manoharan

      We should not do this way .
      It’s not possible

      Even if you tweak it for now
      You cannot update the servers any more

      • You mean that it is not supported to make different customization in different exchange 2010 OWA?

        • Satheshwaran Manoharan

          It does supported . But having 3 owa in same cas server is not supported

          • i already have three OWA, could you please provide me with the was to make different customization (ex: every OWA has it is own logon page)

          • Satheshwaran Manoharan

            How you made 3 owa ?

            You created 3 virtual directories ?

            You followed using any link ?

          • yes i created 3 virtual directories with their own physical path in addition to the default one,, but when i changed the login screen for example in the first OWA it reflect with the same login screen for the other two OWAs but the default one didn’t affected with this

          • Satheshwaran Manoharan

            This configuration won’t work

            I don’t think the copy vd . Will allow creds to the default owa vid

          • So is there any way to make different customization in these different OWA in this situation,,, or at least any other solution to make different customization in different OWA??
            i’m sorry for disturb you many times

          • Satheshwaran Manoharan

            It looks like a interesting solution . Does it allow you to login from a different page ?

          • Satheshwaran Manoharan

            Do you configured with different IP address as described ?

          • yes i now it is good but it is difficult and i hope to help me finalize it if you can .. no it is only one IP and i added with different ports and i will make a redirection from the loadbalance device,, yes i can login with different URLs BUT with just two different pages ,, the customized one and the default one

          • Satheshwaran Manoharan

            Can you tell me the flow .

            Let say the page hits at 445 and shows the custom page with fba

            Now where the re direction is set ?

          • no let me explain more,, tha HUBCAS server has the default website and three OWA,,, i copied and paste the ECP and OWA directories from the exchange installation to another path like this path
            D:\Program Files\Microsoft\Exchange Server\LDCOWA3\ClientAccess\owa then from the virtual directory i navigated to this path from IIS and i can open OWA normally, and i created new web site from IIS with the above directories with port 445 or 446 with exchange cert

  15. by the way it is exchange 2010 not 2013

  16. Thank you for your post. It is very helpful with regards to changing the images on the splash page. I have been searching the web for a way to add a disclaimer type of message to the splash page. In 2010, you could just edit the logon.aspx and add your text after the entry, but in 2013, the file appears completely different and I’m not sure where/what to add to the file to get this to appear. I tried looking at the logon.css file as well, but had no luck.

    Any ideas/pointers?

  17. I figured this out today on my own. You can still add the disclaimer message to your logon page via the logon.aspx page, you just have to put the text in a different place. I inserted my disclaimer text directly after the div class=”hidden-submit” line.

    Hope this helps someone else out there.

  18. Please let me know the syntax you used. Anything we enter is not showing up.

    <!– #include file=”” –>

  19. #
    #<!– #include file=”” –>

  20. Hello,

    How about the location and name of the OWA loading screen logo after login


  21. Hi,

    I have two client access server and member of DAG To customize name and logo of OWA do i need to change in both client access server in the directories which you given?
    C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\Owa\Auth\15.0.516\themes\Resources

  22. Hello Setheshwaran,

    Thank you for your post I really appreciate after long time trying to do these customization,
    so I have different problems about Exchange 2013, I can’t get a certificate it tell me to wait for 10 days until the administrator generate it. I am stuck because I can’t to download it and I can’t also enable IIS without certificates. please any one can help about how can I get exchange 2013 security certificate and PKCS#7 certificates.


  23. Hi,

    very nice post Bro.

    Can you plz guide me how to append DigiCert Logo on my WA page.

    as DigiCert has given me Java and HTML code for DigiCert Seal.

  24. great site man

  25. It’s an remarkable paragraph designed foor all the internet viewers; they
    will obtain benefit from it I am sure.

  26. The thing I noticed going from Exchange 2010 to Exchange 2016 is that logon.aspx moved. The one I’m trying to customize now is at C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa\auth rather than C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\Owa\auth as it was previously. The new page is significantly different than the old one. Fun fun fun.

  27. Is there any way to change the User first login page in OWA ? [New user after getting login]
    For example to modify owa_text_blue.png , olk_login_white.png .

  28. plz i need to add my corporate social media icons and links above the owa_text_blue.png on the right side

  29. Wow, that’s what I was looking for, what a
    information! existing here at this webpage, thanks admin of this website.

  30. Anybody know which section of the logon.css file allows you to change the color of the “sign in” text and sign in arrow so we can change to another color instead of blue? I have hte color # I need, but not sure which section refers to the signin text and arrow, thanks!

  31. Hello Satheshwaran Manoharan can we create new theme in owa 2016 if yes then how to create

  32. Thank you Satheshwaran, this article is so resourceful.

  33. i need the path of the images after login while i am doing customization on exchange 2016 owa

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