Attachments are hidden in Outlook.com tasks and appointments
Because of recent changes at Outlook.com, tasks, appointments, and contacts do not support attachments. You can add attachments to the items in Outlook 2013, but the attachments are hidden.
Meetings are not removed when the invitation is deleted
When a meeting invitation is deleted from the Inbox, the tentative copy of the associated meeting remains in the Calendar.

Outlook Quick Tip: Missing Calendar Bell
Several users who recently upgraded to Outlook 2010 or Outlook 2013 wondered what happened to the reminder bell: The Calendar reminder bell is not displayed on the month view. It's on the other views. How do I turn it on for the month view? Microsoft turned off the bell to give a cleaner appearance. You
Using Outlook.com: Frequently asked questions
Answers to the 'how to use Outlook.com' questions I'm frequently asked.

Select multiple calendars in Outlook
Use VBA to select multiple calendars in overlay mode. Code Sample included.
Use a macro to open the Calendar to appointment date
Macro to replace the Go To Date feature of Outlook's Calendar. From an open appointment, run the macro. The calendar opens to the date of the appointment.
Outlook Reminder Tools
The add-ins listed on this page will help you manage your reminders. Some of the add-ins will forward reminders using SMS or email. For help with reminders, including VBA code samples for dealing with reminders, including doing "something" when a reminder fires, disabling reminders, and more, see the link in More Information, below. More Information

What you need to know about IMAP accounts in Outlook 2013
Outlook 2013 changes how IMAP accounts are handled. Instead of using two data files, Outlook 2013 uses an .ost file for IMAP accounts and stores appointments, tasks, contacts, and notes in the ost, in folders labeled "(This computer only)".

New Appointments are saved in the wrong calendar
When you use an IMAP account in Outlook 2013, appointments and contacts are stored in the IMAP data file. Create a local pst file and move the appointments and contacts to the local data file.
Use a default subject for New messages
How to use a VBA macro to insert a predefined text into the subject field of a new messages. Method works with any Outlook item type.

