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=188.8.131.52, 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
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