I tried to change my email password at ECP using remote address but I got an "Unexpected Error".
Tried using local address and I got below error :-
Server Error in '/ecp' Application.
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.
Parser Error Message: Unknown server tag 'asp:ScriptManagerProxy'.
Line 3: <asp:Content ID="Content1" ContentPlaceHolderID="ResultPanePlaceHolder" runat="server">
Line 4: <asp:ScriptManagerProxy id="smp" runat="server">
Line 5: <Scripts>
Line 6: <asp:ScriptReference Assembly="Microsoft.Exchange.Management.ControlPanel, Version=184.108.40.206, Culture=neutral, PublicKeyToken=31bf3856ad364e35" Name="Microsoft.Exchange.Management.ControlPanel.Client.OwaOptions.js" />
Source File: /ecp/Options.Master Line: 4
Version Information: Microsoft .NET Framework Version:2.0.50727.5472; ASP.NET Version:2.0.50727.7031
Microsoft is conducting an online survey to understand your opinion of the Technet Web site. If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.