IIS Problems with Exchange 2010 SP2

I have many problems With IIS for exchange 2010 when i open ECP , after type user name & PASS
i have received error HTTP 400 & when i open EWS directly received error HTTP 403
I have 4 exchange server 2010 SP2 Enterprise
2 server with mailbox roles
2 server with CAS & Hub Roles "Hyper-v"

DXB ITAsked:
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Glen KnightCommented:
Using the Exchange Management Console under Server Config > Client Access

Click ECP and then right click properties, do you have integrated authentication checked?
Glen KnightCommented:
Here is a good example of how it should be configured: http://www.jonsdocs.org.uk/wiki/index.php/Exchange_2010_ECP_will_not_logon
DXB ITAuthor Commented:
Thanks ECP is working now, but what about EWS i am still receiving HTTP 403 when open https://outlook/ews ...
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Glen KnightCommented:
Have you given application access to EWS?

See here: http://msdn.microsoft.com/en-us/library/ff406134(v=exchg.140).aspx

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DXB ITAuthor Commented:
No can you told me what the command exactly to enable EWS ???
Glen KnightCommented:
I am not at a computer at the moment to provide the exact command to you but there is a good example here: http://thoughtsofanidlemind.wordpress.com/2010/08/12/controlling-ews-access-in-exchange-2010-sp1/
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