Find Office 2013 Microsoft Account for retail key

HKCU/Software/Microsoft/Office/15.0/Common/Identity/Identities/

Unread Mail folder under Favorites in Outlook

I got really used to having quick access to my unread messages using the Unread Mail favorites folder.

Every time I have a new account using Outlook, I always forget to add it back, since it's not done automagically anymore. Once I remember I want it back, I have to look up how to do it!

Sad thing is it's pretty easy.

At the bottom of the list of folders in your account, there's a Search Folder.

Right click Search Folders, and click on New Search Folder.

Make sure Unread mail is selected in the Search Folder box and click OK.

The folder will appear on Search Folders, and then you can right click it and select Show in Favorites. Now you can find the email you left unread so you can deal with it later.... about a week ago. :)

Outlook Secure temp folder

The Outlook Secure Temp folder is a super hidden folder, so, unless you know the full path (and it's randomly named folder, you're not finding it. And that's fun when you have a user that's trying to play the 100th copy of a file with the same file name (can you say "voicemail messages"?) and they get an error message.

To find the Secure Temp folder, you have to hop into the registry.

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Security

Where the number is the number of your version of Outlook. 15 is Office 2013. The registy entry will give you the file path of the Secure Temp folder, go to it and delete the contents (after you make sure they don't have any attachments open from Outlook they haven't saved elsewhere). 

After that, the countdown to the next 100th file starts!