Outlook 2013: Control Panel Mail Won't Open --- not just me having this issue
Outlook 2013's Mail applet will not open from the Control Panel following the June 2016 updates. Click-to-run installations are affected on all operating systems. When users click on the Mail applet the mouse cursor circles, then stops without the applet opening. Right clicking and choosing Open, or using the Run dialog to open the applet also fail.
Microsoft is investigating this issue and until it is fixed, users who need to create a new profile or open a different profile can either open Outlook using the /profiles switch or set a registry key to always display the Choose Profile dialog.
To use the /profiles switch when you open Outlook, open the Run command using Windows key + R then type or paste Outlook.exe /profiles into the Open field and click Ok.
The option to always prompt for a profile when starting Outlook is stored in the registry. To add or change the value, open the registry editor and browse to and change the PickLogonProfile value. If PickLogonProfile does not exist, you'll need to add it.
HKEY_CURRENT_USER|Software|
REG_SZ: PickLogonProfile
Value: 1 = Prompt for a profile to be used; 0 = Always use this profile
To use the /profiles switch when you open Outlook, open the Run command using Windows key + R then type or paste Outlook.exe /profiles into the Open field and click Ok.
The option to always prompt for a profile when starting Outlook is stored in the registry. To add or change the value, open the registry editor and browse to and change the PickLogonProfile value. If PickLogonProfile does not exist, you'll need to add it.
HKEY_CURRENT_USER|Software|
REG_SZ: PickLogonProfile
Value: 1 = Prompt for a profile to be used; 0 = Always use this profile
(source: EMO)
