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Because OWA is a Web interface to an Exchange Server backend, making cosmetic changes beyond editing or replacing..

1. Change Background Color Css Code
2. Change Window Background Color Css Html

images requires some Web programming. Fortunately, you can easily make cosmetic changes to OWA in Exchange Server 2007 without complicated code using cascading style sheets.

Some files that were copied to your new profile folder ended in the .CSS extension, or cascading style sheet files. A cascading style sheet is a text file that assigns values to variables. For example, instead of inserting a line into OWA's source code that tells the interface to make a particular font blue, the source code instructs OWA to assign a font color based on the contents of a variable. This variable is set in a cascading style sheet.

CSS Rounded Corners CSS Border Images CSS Backgrounds CSS Colors CSS Gradients CSS Shadows CSS Text Effects CSS Web Fonts CSS 2D Transforms CSS 3D Transforms CSS Transitions CSS Animations. CSS background properties: background-color; background-image; background-repeat. We want to change the position of the image, so that it does not.

I'll demonstrate how to modify cascading style sheets to change the color of various OWA components. But when you modify a cascading style sheet, you can't enter a color by its name (red, blue, etc.). Colors are entered in six-digit hexadecimal formats, the values of which correspond to RGB values.

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While this sounds complicated, you won't need to perform any mathematical calculations to determine the correct hexadecimal string for a particular color. You will, however, need to use an RGB color conversion chart. As you can see in Figure 7, this chart matches RGB hex values with various color samples, and can contain color codes for thousands of colors.

Figure 7. You can get the code for a particular color from the chart's RGB Hex column. (Click on image for enlarged view.)

Modifying OWA theme colors

Figure 8 shows the current OWA interface, which still has the custom header bar that was created in Part 1. It's important to note two things in this figure:

• The Mail tab on the left side of the screen currently uses a faded yellow background.

• The selected message is displayed with a faded yellow background color, which is known as the secondary selection color. Click on the message and the color switches to the primary selection color, which is basically the background color of the Mail folder.

Figure 8. The OWA profile controls background colors of the Mail tab and the selected messages. (Click on image for enlarged view.)

You can control all colors by editing the Premium.css file. An example of the Premium.css file is shown in Figure 9. I'm using Visual Studio 2005 to modify the file, but Notepad also works.

Figure 9. An example of the Premium.css file. (Click on image for enlarged view.)

Regardless of the editor you use, modifying this file requires just a few substitutions. For example, the color of the Mail tab is controlled by the following block of code. Line breaks were inserted to make it easier to read.

a.nbHiLt { background-color:#FFEFB2; }

FFEFB2 produces a yellow color. If you want to change this color, use the text editor's search feature to locate this block of code and replace it with a color you want from the color chart. For example, using the code B0E2FF would change the mail tab's background to light blue (Figure 10).

Figure 10. The Mail tab's yellow color was replaced with blue. (Click on image for enlarged view.)

You can use the same method to change the primary and secondary colors used to display a selected message. The default code for the primary selection color is:

tr.sel, tr.srsel, tr.lrsel { background-color: #FFEFB2; The default code for the secondary color selection is: tr.shdw, tr.srshdw, tr.lrshdw { background-color:#F8F0D2;

If you want to change these colors, search on these strings and enter the color code that you want, instead of the default colors. The Premium.css file can also be used to customize several aspects of the OWA interface. Be sure to make a backup copy of the original Premium.css file, so that no valuable information is lost when experimenting with various color combinations.

Customizing an OWA sign-on screen

Many companies are also interested in changing the OWA sign-on screen. Often, companies redesign this screen so that it displays their corporate logo and a legal statement regarding the use of the system. Figure 11 shows the default OWA sign-on screen in Exchange Server 2007. Figure 12 shows an adaptation of this screen that one company uses on its employees' systems.

Figure 11. The default OWA sign-on screen used by Exchange Server 2007. (Click on image for enlarged view.)

Figure 12. Example of how the OWA sign-on screen can be adapted. (Click on image for enlarged view.)

It's important to note that a Web developer created the screen shown in Figure 12. You cannot create a sign-on screen that's different from the default screen without doing some coding. If you know ASP coding, you can find the source code for the logon screen in the server's Program FilesMicrosoftExchange ServerClientAccessOwaauth folder. The source code is contained within the LOGON.ASPX file.

If you want to add your corporate logo and some legal text to the OWA sign-on screen, or change the colors, the process is simpler. The customized OWA header bar was comprised of several different graphical elements. This also applies to the OWA sign-on screen. Some of the elements on the OWA sign-on screen are graphic files, while others are text elements that are controlled by the LOGON.CSS file.

Figure 13 shows a sign-on screen in which I have re-colored each graphical element a different color on the OWA sign-on screen. All individual image files can be found in the base profile directory.

Figure 13. The OWA sign-on screen is comprised of various image files. (Click on image for enlarged view.)

Re-coloring image files is straightforward. If you want to add your own corporate logo onto this screen, it's easiest to use a graphic editor such as Photoshop to add your logo to the LGTOPL.GIF file. This is the file that currently displays the Microsoft Exchange logo at the top of the OWA sign-on screen. If you want to conceal that Exchange Server is being used, you might also color over or replace the Exchange logo located in the LGNEXLOGO.GIF file.

The LOGON.CSS file controls all other colors on the OWA sign-on sheet. Following are some elements that you can customize on this screen:

Table 1. Elements that can be customized on the OWA sign-on screen.

Adding a short legal disclaimer to this page can require a great deal of work. Because OWA has been localized for use with different languages, you can't modify the existing text by editing the LOGON.ASPX or LOGON.CSS files. The only way to modify the text in the OWA sign-on screen, or another location in OWA, is to modify the Microsoft.Exchange.Client.Strings.resources.dll file, found in the Program FilesMicrosoftExchange ServerClientAccessOWABinen folder. Figure 14 shows some of the text that OWA's sign-on screen uses.

Figure 14. Most text that OWA uses is stored within a DLL file. (Click on image for enlarged view.)

Using a binary file editor to modify a DLL file is very dangerous. If you make even a minor mistake, you can destroy or invalidate the DLL. Therefore, I recommend modifying the LOGON.ASPX file instead.

The LOGON.ASPX file doesn't contain any existing text, but a Web developer familiar with ASP coding should be able to add a legal disclaimer to this file. In Figure 15, you can see that I have added a legal disclaimer to the OWA sign-on screen by inserting a line of text into the LOGON.ASPX file. Figure 16 shows the exact location where I inserted this text.

Figure 15. Add a legal disclaimer to the OWA sign-on screen. (Click on image for enlarged view.)

Figure 16. Modified code. (Click on image for enlarged view.)

TUTORIAL: Customizing Outlook Web Access in Exchange Server 2007
Home: Introduction
Part 1: Modifying the look of OWA in Exchange Server 2007
Part 2: Using cascading style sheets to change a color in OWA
Part 3: How to handle file attachment access in OWA
Part 4: Control how users access files with WebReady Document Viewing
Part 5: Enable user-level segmentation to control OWA components

The opacity property specifies the opacity/transparency of an element.

Transparent Image

The opacity property can take a value from 0.0 - 1.0. The lower value, the more transparent:

opacity 0.5

Note: IE8 and earlier use filter:alpha(opacity=x). The x can take a value from 0 - 100. A lower value makes the element more transparent.

Example

Transparent Hover Effect

The opacity property is often used together with the :hover selector to change the opacity on mouse-over:

Example

Example explained

Change Background Color Css Code

The first CSS block is similar to the code in Example 1. In addition, we have added what should happen when a user hovers over one of the images. In this case we want the image to NOT be transparent when the user hovers over it. The CSS for this is opacity:1;.

When the mouse pointer moves away from the image, the image will be transparent again.

An example of reversed hover effect:

Example

Change Window Background Color Css Html

Transparent Box

When using the opacity property to add transparency to the background of an element, all of its child elements inherit the same transparency. This can make the text inside a fully transparent element hard to read:

Example

Transparency using RGBA

If you do not want to apply opacity to child elements, like in our example above, use RGBA color values. The following example sets the opacity for the background color and not the text:

You learned from our CSS Colors Chapter, that you can use RGB as a color value. In addition to RGB, you can use an RGB color value with an alpha channel (RGBA) - which specifies the opacity for a color.

An RGBA color value is specified with: rgba(red, green, blue, alpha). The alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque).

Tip: You will learn more about RGBA Colors in our CSS Colors Chapter.

Example

Text in Transparent Box

This is some text that is placed in the transparent box.

Example

First, we create a <div> element (class='background') with a background image, and a border. Then we create another <div> (class='transbox') inside the first <div>. The <div> have a background color, and a border - the div is transparent. Inside the transparent <div>, we add some text inside a <p> element.

Test Yourself with Exercises!