XCLN: Cannot Open Third-Party Applications Attached in Exchange

RESOLUTION

To resolve this problem, you need to modify the appropriate file associations in the Exchange Preferences file.

NOTE: To do any of the following, you need a third-party Macintosh application called ResEdit.

Before attempting the following change, you must know the appropriate file extension, creator, and type. To get this information, start ResEdit, and on the File Menu, click Get File/Folder Info, and select one of the files in question.

1. Make a backup copy of the Exchange Preferences file. In the System folder, click the Preferences folder, and click the Exchange Preferences file icon. From the File menu, click Duplicate. This is just a precautionary measure in case using ResEdit causes a problem with your Preferences file.
2. If it's not already running, start ResEdit.
3. Open the Exchange Preferences file.
4. Open the STR # section.
5. Double-click Mac File Types.
6. For every file type, there should be a string entry. To modify a file association, simply select the file association you want to edit. To enter a new string, on the Resource menu, click Insert New Field. Use the format:

   .ext=:creator:type

7. After the appropriate information has been entered, save the file.
8. When the Exchange Macintosh client is started, the edited or new file association is available.