Another user can create and send meeting requests on behalf of a mailbox owner even though "Send As" and "Send On Behalf Of" permissions were not granted in Exchange Server 2003

Consider the following scenario. On the Exchange Advanced tab in the Active Directory Users and Computers snap-in in Microsoft Exchange Server 2003, you grant "Full Mailbox Access" permissions for a user's mailbox to another user. You do not grant "Send As" or "Send On Behalf Of" permissions. Therefore, you expect that the other user cannot send e-mail messages or meeting requests on behalf of the mailbox owner.

In this scenario, the other user can access the mailbox as expected. The other user cannot send e-mail messages on behalf of the mailbox owner as expected. However, the other user can create meeting requests and send meeting request e-mail messages on behalf of the mailbox owner.

Hotfix information

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.

Prerequisites

You must have Microsoft Exchange Server 2003 Service Pack 2 (SP2) installed to apply this hotfix.

Restart requirement

The following services are stopped and then restarted after you apply this hotfix:

• Microsoft Search
• Microsoft Exchange Information Store service
• Microsoft Internet Information Services (IIS) Admin Service and all dependent services

Hotfix replacement information

This hotfix does not replace any other hotfix.

File information

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 Zone tab in the Date and Time item in Control Panel.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base: