When you use Microsoft Outlook Web Access (OWA), you may
experience one or more of the following symptoms:
- The Inbox opens and all the icons appear, but a
"Loading..." message appears where you expect to see your message list. If you
try to view public folders, the screen is blank. If you use OWA with Netscape
Navigator to view your Inbox and Public Folders, all your messages are
- When you try to log on, you receive the following error
The item could not be found. It may have been
- When you try to open messages that include certain
characters in the Subject box, you receive the following error
message in your browser:
The page cannot be
The page you are looking for might have been removed, had its
name changed, or is temporarily unavailable.
Please try the
- If you typed the page address in the Address bar, make
sure that it is spelled correctly.
- Open the <server> home
page, and then look for links to the information you want.
the Back button to try another link.
HTTP 404 - File not
You have determined that there are no network devices, such as
firewalls or routers, that are blocking communication between your client and
the OWA Web server.
These symptoms occur if you have installed the URLScan tool
on the Web server where OWA is installed, and you have not changed the default
For more information about the URLScan tool, visit the
following Microsoft Web site:
To resolve this issue, use one of the following methods.
Method 1: Modify URLScan settings
To modify the URLScan settings to permit additional Web
Distributed Authoring and Versioning (WebDAV) verbs and Hypertext Transfer
Protocol (HTTP) verbs through URLScan, modify the Urlscan.ini file.
additional information about how to modify the Urlscan.ini file, click the
following article number to view the article in the Microsoft Knowledge Base:
IIS Lockdown and URLScan configurations in an Exchange environment
Method 2: Remove the URLScan tool
To remove the URLScan tool, follow these steps:
- Click Start, point to Settings, and then click Control Panel.
- Double-click Add or Remove Programs.
- Click IIS UrlScan Tool 2.0 (Uninstall), and then click Change/Remove.
- Click Yes to restart Internet Information Services (IIS).
- Click OK to confirm the location of the URLScan log file, and then click Close.
By default, the URLScan utility blocks access to messages
that contain the following characters in the Subject
the following reasons:
.. ; Does not allow directory traversals
./ ; Does not allow trailing dot on a directory name
\ ; Does not allow backslashes in URL
: ; Does not allow alternate stream access
% ; Does not allow escaping after normalization
& ; Does not allow multiple CGI processes to run on a single request
If you change " .." to " ../", requests are protected from the
traversal, and e-mail messages that have ellipsis (...) in the subject are
information about the URLScan utility, click the following article number to
view the article in the Microsoft Knowledge Base:
IIS lockdown and URLscan configurations in an Exchange environment