Outlook Web access Light disable yapmak

First, look for the OWA 2007 FBA logon.aspx file in the
C:\Program Files\Microsoft\Exchange
Server\ClientAccess\Owa\auth
folder.
Make a copy of it (important if something goes wrong),
and then open it in Notepad.
Press F3 to search for text, type chkBsc, then Enter.
You should see a few lines that begin like this:

<tr>
  <td><input id="chkBsc" type="checkbox" class="rdo" onclick="clkBsc();" disabled...
  <td nowrap><label for="chkBsc"><%=LocalizedStrings.GetHtmlEncoded(Strings.IDs...
</tr>

What you have found is the code that produces
the checkbox and the text beside it.

If you delete these lines,
the checkbox will not appear;
but the safest way to remove it
(in case you want to undo this in the future)
is to place HTML comment tags
(<!-- and -->)
around the <tr> and </tr> tags
.
After doing that,
the section of code should look like this:

<--<tr>
  <td><input id="chkBsc" type="checkbox" class="rdo" onclick="clkBsc();" disabled...
  <td nowrap><label for="chkBsc"><%=LocalizedStrings.GetHtmlEncoded(Strings.IDs...
</tr>-->

You should find that the 'Light' checkbox no longer appears.

As with most of these type of modifications,
you will need to check that they still
function after each product update.
Sometimes your modified file
will be replaced by a new one from the update.