The Mail icon is missing from Control Panel

CAUSE
This issue may occur if the registry entry that points to the Mlcfg32.cpl Control Panel file is missing or damaged.

RESOLUTION
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using
another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To resolve this issue, follow these steps:
1.Make sure that the following Control Panel file exists and that it works as expected:
Drive:\Program Files\Common Files\System\MSMAPI\1033\mlcfg32.cpl
    
2.Click Start, click Run, type regedit, and then click OK.
    
3.Locate the following registry subkey:
HKEY_CURRENT_USER\Control Panel\MMCPL
    
4.Make sure that the mlcfg32.cpl registry entry exists. Additionally, make sure that its value is set as follows:
Drive:\Program Files\Common Files\System\MSMAPI\1033\mlcfg32.cpl
If the mlcfg32.cpl registry entry does not exist, you must create it. To do this, follow these steps:
a. Right-click the MMCPL registry subkey, point to New, and then click String Value.
b. type mlcfg32.cpl as the name of the registry entry.
c. Double-click the mlcfg32.cpl registry entry, type Drive:\Program Files\Common Files\System\MSMAPI\1033\mlcfg32.cpl in the Value Data box, and then click OK.
    
5.Exit Registry Editor, and then open Control Panel. The Mail icon is displayed as expected.    

PS.
I'm using Outlook 2007, so my mlcfg32.cpl is located in
Drive:\Program Files\Microsoft Office\Office12\MLCFG32.CPL
and the setps are:
1.Make sure that the following Control Panel file exists and that it works as expected:
Drive:\Program Files\Microsoft Office\Office12\MLCFG32.CPL

2.Click Start, click Run, type regedit, and then click OK.

3.Locate the following registry subkey (if not exist, create it):
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Control Panel\Cpls
    
4.Make sure that the mlcfg32.cpl registry entry exists. Additionally, make sure that its value is set as follows:
Drive:\Program Files\Microsoft Office\Office12\MLCFG32.CPL
If the mlcfg32.cpl registry entry does not exist, you must create it. To do this, follow these steps:
a. Right-click the Cpls registry subkey, point to New, and then click String Value.
b. type mlcfg32.cpl as the name of the registry entry.
c. Double-click the mlcfg32.cpl registry entry, type Drive:\Program Files\Microsoft Office\Office12\MLCFG32.CPL in the Value Data box, and then click OK.
    
5.Exit Registry Editor, and then open Control Panel. The Mail icon is displayed as expected.

In fact, there are other ways to get back the Mail icon. Let's talk about it later.