In Hide Outlook's default folders, I show you how to hide (or delete) the folders Outlook creates in the default data files. If you want to keep the folder but give it a new name, you can do this as well, using either MFCMAPI or OutlookSpy to edit the folder name.

Before using MFCMAPI or OutlookSpy to edit a Personal Folder (pst), you should make a copy of your data file! While these steps are safe to use, it is very easy to have an "Oops, did I do that?" moment and lose your data.

In this tutorial, I'm going to use MFCMAPI to change the folder names. You'll need the 32-bit version if you use Outlook 2007, or Outlook 2010 and up in 32 bit. The 64-bit version is for use with Outlook 64-bit (NOT 64-bit Windows).

Rename Outlook.com Calendar & Tasks | More Information
Hide or delete the default folders

Rename a default folder

1. After downloading MFCMAPI, double click on it to run.
2. Click Session > Logon and choose your profile (if you have more than one)
3. Double click on your data file. If you have more than one data file, the top entry should be your default.
4. Expand Root - Mailbox (or Root Container)
5. Expand IPM_SUBTREE (or Top of Outlook Data Files)
6. Locate the folder you want to rename.
7. You can change the display name by clicking on it twice and editing the name.



8. Close the window and return to the main MFCMAPI window.
9. Select Session > Logoff and return to Outlook.

Rename Outlook.com Calendar to remove [1]

These instructions rename Calendar (and the companion Tasks folder) folders created in Outlook.com mailbox when syncing with Outlook 2013.

When you edit the folder names in an Outlook.com / Hotmail data file, the change is made only in the local folder. It does not sync to the server. Removing the account from Outlook and adding it back will restore the original folder names.

The default Task and Calendar names Outlook 2013 uses for additional calendars created at Outlook.com uses the Calendar name for Tasks and adds a [1] to the Calendar name.

You can edit the calendar names to maintain consistancy, with the same calendar name online and in Outlook and use "Tasks - Calendar Name" format for the tasks folder.

1. In the Calendar online, rename the Calendars, adding a 1 to each Calendar name.
2. Open Outlook, or if open, do a send and receive to refresh the calendar names.
3. Open MFCMAPI.
4. Click Session > Logon and logon to your profile
5. Double click on your Outlook.com data file.
6. Expand Root - Mailbox
7. Expand IPM_SUBTREE
8. Locate the Calendar folder you want to rename.
9. Change the Calendar display name by clicking on it twice then removing "1 [1]" from the name.



10. Close the window and return to the main MFCMAPI window.
11. Select Session > Logoff and return to Outlook.
12. In Outlook.com online, remove the 1 from the calendar names.
13. Initiate a Send and Receive.
14. The Task names change to "Task - Calendar Name" format.

Remember: When you edit the folder names in an Outlook.com/Hotmail data file, the change is made only in the local folder. The names do not sync to the server or to other profiles using this account. If you delete the data file or remove the account from Outlook, Outlook will create the original names, with [1] behind the calendar.