The messaging interface has returned an unknown error. It the problem persists, 
	restart Outlook.
	With any version of Microsoft Outlook when used with a Microsoft Exchange 
	Server you may get the following error when trying to print another users shared 
	calendar. "The messaging interface has returned an unknown error. It the 
	problem persists, restart Outlook." This problem occurs if the user that 
	is trying to print does not have rights to the other user's "TASKS" 
	folder. There are two ways to fix this problem. You can share the users "TASKS" 
	folder or you can print without task information.
	
		- To share the TASKS folder.
- 
		
			- On the View menu in Outlook, click Folder List to display your mail 
			folders.
- Right-click the Tasks folder and click Properties on the shortcut 
			menu.
- Click the Permissions tab and click Add.
- Under "Type Name or Select from List", click to select 
			the user you want to grant permissions and click Add to add them to 
			the Add User list and click OK.
- In the Name and Role list, click to select your new user.
- In the Roles list, click at least Reviewer and click OK.
 
-  
- To print without TASKS information.
- 
		
			- Open the shared calendar.
- On the File menu, click Print.
- Under Print Style, click to select Daily Style and click Page Setup.
- Click to clear the TaskPad check box.