Avoiding Excessive Security Warnings when Sending Automated E- mail Messages. Even though these warnings help alert users to possible attacks from malicious programs, some users may get accustomed to acknowledging them and perhaps overlook a real threat. Find out how you can design applications that avoid overuse of these warnings, where appropriate. These versions include Outlook 2. Outlook 2. 00. 2, Outlook 2. Service Pack 2 (SP2), and versions of Outlook 2. SP2 and Outlook 9. Outlook security update. Outlook applications that access these blocked properties and methods in the object model can generate security warnings for the user. In particular, Outlook applications that automatically send e- mail through the object model of the above versions of Outlook always trigger a . While these security warnings help protect users from computer virus attacks, depending on the design of the application, these warnings may get displayed so frequently that some features may become virtually unusable. Some users may eventually overlook the importance of the warnings. Learn about the types of security warnings and how administrators and application designers can avoid overusing them, where appropriate. How to stop the Outlook “A program is trying to access. Navigate through HKEY. OneNote, Outlook, Publisher, and Access. Each Office 365 subscriber gets access to tech support from Microsoft. For Office 365 plans, Internet access. Monitoring WebMail (Microsoft Office Outlook Web. A program is trying to access e-mail addresses you. ![]() ![]() A program is trying to access e-mail addresses you have stored in Outlook. A program is trying to access e-mail addresses you have stored in Outlook. A program is trying to send an e. Policies\Microsoft\Office\<version>\Outlook. ![]() Types of Security Warnings. Generally, when an application attempts to access a method or property that has been blocked in the Outlook object model, a security warning is displayed. The following articles list the methods and properties subject to the Outlook security object model guard in each version of Outlook. To discourage the user from affirming the action without giving it some thought, the Yes button is initially disabled for a 5- second period. Figure 1. Send e- mail security warning for Send method. Sending e- mail with the Execute method of the Action object also invokes the following security warning (Figure 2). Figure 2. Send e- mail security warning for Execute method of Action object. Accessing Address Information. If an application tries to access address information in an Outlook item or the address book, or attempts to save an Outlook item as a file, the user sees the following security warning (Figure 3). The user can choose to deny access, authorize a one- time access, or authorize access for up to 1. Figure 3. Access e- mail addresses security warning. Note that, in general, accessing a blocked property invokes a security warning, but assigning it does not. A program is trying to access e-mail address. Microsoft Office 2013 latest version. Outlook 2013, OneNote 2013, Access 2013. Microsoft Outlook 2013; Office 365 Home. Policies\Microsoft\Office\(Your outlook. For example, this line will invoke a security warning: Debug. Print obj. Mail. Item. To. but this one will not: obj. Mail. Item. To = . Level 1 attachments generally are program files capable of malicious acts and are completely blocked by the object model guard. If an application attempts to attach a file that belongs to the Level 1 file types, the application will get a warning and will not be able to succeed. Outlook does not allow opening a Level 1 attachment either. Note. The attachment is only hidden in Outlook; other e- mail programs that do not block such attachments will still open them. See Attachment File Types Restricted by Outlook 2. Level 1 attachment types that apply to all versions of Outlook that have the object model guard active. In addition to the default Level 1 list, Outlook 2. SP3 blocks the Outlook Personal Folder file type (. The object model guard supports Level 2 attachment types that require the e- mail recipient to save an attachment to disk before opening it. Level 2 files are generally considered less of a threat than Level 1 files; the antivirus program on the local computer is expected to scan the file for security once it is saved to disk. Note that Level 2 attachments cannot be forwarded. The object model guard does not specify by default any file type as a Level 2 attachment; administrators in a Microsoft Exchange Server environment can use the administrative security form to specify file types for Level 2 attachments. Ways to Avoid Security Warnings. Generally, the object model guard is always active, even in cases where the code is digitally signed, unless the application is an Outlook 2. Component Object Model (COM) add- in or it runs from a published Outlook 2. In scenarios where the object model guard displays security warnings, there are a number of administrative and programmatic alternatives that applications could use to modify this behavior. Among these alternatives, the administrative security form, trusted COM add- ins, appropriate registry settings, and Extended Messaging Application Programming Interface (MAPI) work well with Outlook. There are also Microsoft Windows and third- party libraries and tools that allow applications to bypass part or all of the Outlook object model guard, but not all of them are supported by Outlook. Table 1 provides a summary of these alternatives and the actions for which they can be used to modify the display of security warnings. The remainder of this article describes these alternatives and provides additional references that show how to implement them. Table 1. Options to modify the display of security warnings. These settings override the default security settings in Outlook. Using this form is the only way within Outlook to modify overall how the object model guard displays security warnings, including those invoked by applications trying to send e- mail programmatically. The administrator installs the security form in a public folder and uses it to configure security options. The form supports the following customizations. Trusting COM add- ins so that calls to blocked properties and methods do not invoke any security warnings. For Outlook 2. 00. COM add- ins should be constructed in a certain way, as described below in the . For Outlook 2. 00. Outlook objects from the intrinsic Application and Item objects. Specifying whether to prompt, automatically approve, or automatically deny when sending Outlook items, accessing address information, and saving an Outlook item. Specifying their own sets of Level 1 and Level 2 attachments. Lowering the default security settings for Level 1 attachments. For information for earlier versions of Outlook, see the Microsoft Office Resource Kit for the corresponding version. Trusted COM Add- ins. For Outlook 2. 00. Outlook 2. 00. 2, COM add- ins can be trusted through the administrative security form. Outlook 2. 00. 3 has additional security changes for COM add- ins. One condition for COM add- ins to be trusted is to derive all objects from the Application object passed by the On. Connection event. You can also specify whether to trust all installed COM add- ins in the macro security dialog box. For more information on trusting COM add- ins, see What's New in Microsoft Office Outlook 2. Developers for Outlook 2. Using the COM Add- in Shim to Trust Outlook 2. Add- ins Built with Visual Studio . NET for Outlook 2. Registry Settings. Security warnings about file attachments can be generated when an application attempts to add certain attachment types to an e- mail message before sending it programmatically. In Outlook 2. 00. Outlook 2. 00. 0 SP3, end users and system administrators can modify the system registry to change the file attachment types that the object model guard blocks by default. For more information, see Microsoft Knowledge Base Article . COM add- ins and external programs written in C, C++, or Delphi can fully utilize Extended MAPI to avoid security warnings generated by the Outlook object model guard. Outlook developers can choose to use Extended MAPI to avoid security warnings if, for some reason, their COM add- ins cannot be run as trusted. Note. For more information, see Microsoft Knowledge Base Article . The collection is commonly known as CDOSYS and is available as CDOSYS. DLL. CDOSYS implements the 2. Collaboration Data Objects API specification; it bypasses the Outlook object model and hence does not invoke security warnings of the Outlook object model guard. For more information, see Collaboration Data Objects for Windows 2. Programmatically Acknowledging Security Warnings. The Microsoft Visual Basic or Visual Basic for Applications Send. Keys command can be used in earlier, unpatched versions of Outlook to programmatically acknowledge security warnings. A number of third- party tools also exist to acknowledge security warning dialog boxes automatically, but these alternatives are highly discouraged. Warning. This feature prevents malicious programs from automatically dismissing the warning messages and circumventing the security features. Conclusion. The Outlook object model guard helps protect users from malicious viruses and worms that can be spread by exploiting Outlook. Applications using the Outlook object model invoke security warnings when they attempt to send e- mail, access any address information, or attach certain files to an e- mail message. Under some circumstances, these warnings may be overwhelming and thus render themselves ineffective. Administrators and application designers can use various methods to avoid overuse of these warnings, where appropriate. Resources. Customizing Outlook 2. Help Prevent Viruses.
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