

Use a text editor, such as Notepad, to open LanguageSelection.css.Ĭustomize the images on the sign-in and error pages Log on to the Exchange server, then use Windows Explorer to go to the Exchange server installation directory and find %ExchangeInstallPath%ClientAccess\Owa\prem\\resources\styles. Use a text editor, such as Notepad, to open errorFE.css.Ĭustomize the color of the language selection page Search for the default color value #0072c6 and replace it with the HTML RGB value for the color you want to use. Use a text editor, such as Notepad, to open logon.css. Log on to the Exchange server and use Windows Explorer to go to the Exchange server installation directory and find %ExchangeInstallPath%FrontEnd\HttpProxy\owa\auth\\themes\resources. Having problems? Ask for help in the Exchange forums. You'll have to copy your customized files back to the appropriate folder after the reinstallation or upgrade is complete.
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If you reinstall or upgrade Exchange, all files in the themes folders will be overwritten. You should also create a back-up copy of your customized files. If you have multiple servers supporting Outlook Web App and want them all to use the same sign-in, language, and error pages, you must copy the modified files to each server. If you must match a specific color and you can't find a match for it at Color Table, you can use an image editing tool to sample a color and determine its HTML RGB value. You'll need a text editor to change the default colors, and a graphics editor to change the images. You can find the theme resources folder in the Exchange installation directory at %ExchangeInstallPath%FrontEnd\HttpProxy\owa\auth\version\themes\resources. Any modifications to those pages will be seen by all users.

Outlook Web App uses only one set of sign-in, language selection, and error pages for all themes. css files in the themes resources folder. The Outlook Web App sign-in, language selection, and error pages are created based on graphics and. This topic explains how to customize the color and images of the sign-in, language selection, and error pages for Outlook Web App.
