The information contained in this section will help you solve problems with Outlook. While some of the problems are related to bugs (which may or may not get fixed), many of the problems are just how Outlook was designed, which doesn't necessarily fit with how we want to use it. Other problems are caused by the interaction between Outlook and other programs or Outlook add-ins.
Outlook is sending unknown messages
We're seeing reports from users that suspect Outlook is sending spam. Some users think it means that their computer is infected with an previously unknown spambot, it's not. It's a bug in how Outlook 2007 responds to Read Receipt Requests for Junk Email I recently found something terrible in my system. Special types of spam

.XNK Extension Error: "Cannot Open File"
When you attempt to open an Exchange Server Public Folder using a .xnk shortcut you receive the following Error: Cannot Open File This is due to tighter security in Outlook 2007. Workaround If you need to open xnk shortcut files, you can create a link association between the .xnk file name extension and Outlook 2007.
Outlook Sync Client Error
We're seeing users complain about an error message popping up on the computer screen. The error dialog doesn't contain much information about the program or the cause. Others receive an error "OutlookSyncClient has stopped working." The Outlook Sync Client is used to sync iPhone, iPod and iTouch with Outlook. This error generally means there is
Error Printing HTML Formatted Email
When you receive an error when printing HTML formatted email it's a problem with the IE printing process. At the Start, Run command, type the following in the field and press Ok. regsvr32 shdocvw.dll Tip: To open the Run command, press Windows Key + R in any Windows version. Type or paste the command into
Invalid Page Fault in Outlrpc.dll
If you get an invalid page fault in module Outlrpc.dll, when you start Outlook, this probably means that you have an outdated or damaged Msvcrt40.dll file on your system. Msvcrt40.dll is a Microsoft C Runtime Library file and is in your \Windows\System folder. The correct file is version 4.10.6038 with a size of 326,656 bytes

Disable "Always ask before opening" Dialog
We're hearing from many users: Outlook always prompts for permission to open attachments and the checkbox for "Always ask before opening this type of file" is grayed out. This is due to User Access Control (UAC) restrictions in Windows. There are two ways you can address this: 1: Run Outlook as Administrator and open the
Printing Calendars with Color Categories
Some Outlook 2007 users are having problems printing calendars with the events colored with color categories. In most cases, the problem printer is an HP and its correctly configured to print in color. HP support documents have this to say about the problem: Some or all of my jobs print in monochrome (black) only. How

Embedded Objects are Blocked in Outlook Items
How to avoid the error message: "Outlook blocked access to the following potentially unsafe attachments" after inserting objects into Outlook Tasks or using Word's Create Outlook Task command.
Convert an Exchange or IMAP .OST to a .PST
How to convert an ost file to pst file in order to open it in an Outlook profile.
How to Fix ‘Edit <0W>’ Folders
"I have phantom folders named Edit <0W> X folder (the X increments from 0 to 89 at last glance showing up in a .pst file. I can delete most of them, but 0 and 2 I cannot, and when I close Outlook, a lot of them come back! Those folders are created by security or
iPhone, Outlook, and Disappearing Appointments
A hotfix for Exchange server is available. See the following KB article for more information. Note: your Exchange administrator will need to install this update on the Exchange server. Some recurring calendar items disappear from the "Day/Week/Month" view in Outlook when a user uses Exchange ActiveSync on a mobile device to modify a recurring meeting

The Folder is Full Error
Solution for: "Cannot delete this folder. Right-click the folder, and then click Properties to check your permissions for the folder. See the folder owner or your administrator to change your permissions. The folder is full". error