Consider the following scenario. You open an unsigned e-mail
message in Microsoft Outlook Web Access (OWA). This e-mail message includes a
signed e-mail message as an attachment. In this scenario, when you open the
attached e-mail message, OWA does not validate the message's signature. Additionally, you
receive the following error message:
The message has a
digital signature, but it was not validated. Attachments will not be included
on a reply or forward.
You do not experience this problem when both e-mail messages are
You do not experience this problem when you open the same e-mail
messages in an Outlook client.
This problem occurs if the template that is used to open the
signed message does not use the S/MIME control. If the template does not use
this control, the template cannot validate the signature.
Serious problems might occur if you modify the registry
incorrectly by using Registry Editor or by using another method. These problems
might require that you reinstall the operating system. Microsoft cannot
guarantee that these problems can be solved. Modify the registry at your own
resolve this problem, install this hotfix. After you install this hotfix, you
must enable it by adding a CheckEmbeddedSmime registry entry to the
registry subkey. To do this, follow these steps:
- Click Start, click Run,
type Regedit, and then click
- Locate and then click the following registry subkey:
- On the Edit menu, point to
New, and then click DWORD Value.
- Type CheckEmbeddedSmime, and then
- Right-click CheckEmbeddedSmime, and then
- In the Edit DWORD Value dialog box, under
Base, click Decimal.
- In the Value data box, type
1, and then click OK.
- Exit Registry Editor.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix. Note
If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note
The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Because of file dependencies, this hotfix requires Microsoft
Exchange Server 2003 Service Pack 2. For more information, click the following article number to view
the article in the Microsoft Knowledge Base:
How to obtain the latest service packs for Exchange Server 2003
You do not have to restart the computer after you apply this
hotfix. However, the following services are restarted automatically when you
apply this hotfix:
- The Microsoft Exchange Information Store service
- The IIS Admin Service and all dependent services
Hotfix replacement information
This hotfix does not replace any other hotfixes.
The English version of this hotfix has the file
attributes (or later file attributes) that are listed in the following table.
The dates and times for these files are listed in Coordinated Universal Time
(UTC). When you view the file information, it is converted to local time. To
find the difference between UTC and local time, use the Time
tab in the Date and Time
item in Control
Collapse this tableExpand this table
|File name||File version||File
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section.
information, click the following article number to view the article in the
Microsoft Knowledge Base:
to configure Exchange Server 2003 OWA to use S/MIME