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In File Explorer, browse to %ExchangeInstallPath%ClientAccess\OWA\prem\\resources\styles\. Note: An easy way to rename the folder is to select it, and then press the F2 key. Rename the new theme folder that you created in the previous step. Note: An easy way to copy and paste the theme folder is to select the folder, press the Control key + C, and then press the Control key + V. This results in a new folder named - Copy. Select an existing theme folder in the \themes folder, copy it, and then paste it back into the \themes folder. In File Explorer, browse to %ExchangeInstallPath%ClientAccess\OWA\prem\\resources\themes.
#Download outlook 365 theme update
nn, and indicates the Exchange Cumulative Update (CU) that's installed.Īfter you've identified the theme that's closest to what you want (for example, with or without a header image), you need to copy the theme folder and the corresponding files, and then rename the copied folders and files Note: The subfolder uses the syntax 15.1. %ExchangeInstallPath%ClientAccess\OWA\prem\\resources\styles\ contains the _.less and files that define the colors that are used in the theme. %ExchangeInstallPath%ClientAccess\OWA\prem\\resources\themes\ contains the theme folder that holds the header image, theme preview image, and theme description text. The theme files and folders are stored in the following locations: You can use the information in the Default Outlook on the web themes in Exchange Server section at the end of this topic to match the display name of the theme in Outlook on the web to the name of the theme folder on the Exchange server. You can inspect the built-in themes by opening a mailbox in Outlook on the web, selecting Settings, and then selecting Change theme. Step 1: Use File Explorer to copy the folders and files of an existing theme, and rename the copied folders and files Having problems? Ask for help in the Exchange forums. If you decide to directly edit an existing theme (not a copy of the theme), make a backup copy of the original files before you modify them.įor information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard shortcuts in the Exchange admin center. If you can't find the color there, you can use an image editing tool or an HTML color codes web site to determine its HTML RGB value.ĭon't delete the folder %ExchangeInstallPath%ClientAccess\OWA\prem\\resources\themes\base, or any files in it. You can find HTML RGB values at Color Table. To replace an existing color with a new color, you need the HTML RGB value of the new color. The light version of Outlook on the web doesn't support themes. The account you use also needs to be a member of the local Administrators group on the Exchange server. To see what permissions you need, see the "Outlook on the web virtual directories" entry in the Clients and mobile devices permissions topic.
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You need to be assigned permissions before you can perform this procedure or procedures. What do you need to know before you begin?Įstimated time to complete this task: 45 minutes. For more information, see Customize the Outlook on the web sign-in, language selection, and error pages in Exchange Server.
#Download outlook 365 theme upgrade
You should also create a backup copy of the new theme so you can copy the files back after you reinstall or upgrade the Exchange server.Īfter you create a theme, you may also want to customize elements that are common to all themes. If you use multiple Exchange servers for Outlook on the web client connections, you need to copy the new theme to each server. Restart IIS for the changes to take affect. (Optional) Allow users to see and select the new theme (Optional) Set the new theme as the default, and prevent users from selecting themes. The basic steps to create a new theme for Outlook on the web are:Ĭopy the folders and files of an existing theme, and rename the copied folders and files.Ĭonfigure the display name and sort order of the new theme. The built-in themes are described in the Default Outlook on the web themes in Exchange Server section at the end of this topic. Each theme is a collection of files that are stored on the Exchange server.
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A theme defines the colors, fonts, and images that are displayed to users in Outlook on the web (formerly known as Outlook Web App) in Exchange Server.