To add your own command to the Lync 2010 Help menu, use the HelpMenuText and HelpMenuURL Group Policy settings. For details, see Key Client Policies and Settings.

The following example shows a Contoso Help Desk command added to the Lync 2010 Help menu:

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Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Communicator] "HelpMenuText"="Contoso Help Desk" "HelpMenuURL"="http://contoso/help/Contso_Help_Desk.htm"

To redirect Lync 2010 Help and the Lync 2010 F1 key to an internal website, use the New-CSClientPolicy or Set-CSClientPolicy Lync Server Management Shell cmdlets with the EnableEnterpriseCustomizedHelp and CustomizedHelpUrl parameters.

For example:

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New-CsClientPolicy -Identity ContosoLyncHelp -EnableEnterpriseCustomizedHelp $True -CustomizedHelpUrl "http://contoso/help/ContosoLyncHelp.htm"

Use Grant-CSClientPolicy to assign this new policy to users. For details, see New-CsClientPolicy and Grant-CsClientPolicy in the Lync Server Management Shell documentation.