“Unsupported folder class” error when Outlook starts
If you are getting unsupported folder class error in outlook then you will get the process to solve unsupported folder class message in outlook in this content. If you install Apple iCloud control in your computer that is windows vista or windows 7 operating system based and then if you synchronize it with Microsoft outlook 2007 or Microsoft outlook 2010 then you may receive the “Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. Unsupported folder class (IPF.Contact)” error message in outlook. The given error message occurs when you start outlook. The error message generally occurs in outlook 2007 and it’s above. The causes and solution of the unsupported folder class error is given briefly in this content.
Causes of unsupported folder class error
A custom data file structure is used by Apple iCloud data file but Outlook never use the data file as default data file that is why you are getting “Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. Unsupported folder class (IPF.Contact)” error message when you are opening outlook.
Process to fix unsupported folder class error
If you want to fix unsupported folder class error then go to start button and then click on run. Now type control panel in the run window and then press enter. You will see the control panel window will be open then click on mail setup. After clicking on it click on show profiles that is available in the mail setup dialog box. After that choose your current outlook working profile and then click on properties. Now click on Data files that are available in the Mail setup Profile name dialog box.
After that now you have to click on Data files tab that is in the account setting dialog box and choose an outlook data file here that have the .pst extensions and after choosing click on set as default button. Now close all the setting window and outlook. After closing it restart the computer and then open outlook. You will see the error that are you facing before is not occurs again. You can also use the third party tool just like outlook PST repair tool to fix unsupported folder class error. This is also a best choice to fix this error.