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This might help:<br />
<a href="http://social.technet.microsoft.com/Forums/en-US/exchangesvrtransport/thread/686d1a90-a016-4a4c-ae2e-6725914a5d5a/" rel="ugc nofollow">http://social.technet.microsoft.com/Forums/en-US/exchangesvrtransport/thread/686d1a90-a016-4a4c-ae2e-6725914a5d5a/</a>
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Thanks for the fast reply<br />
4. Made sure that the 'exppw.dll' is only present at OWA level and not at any of the top heirarchy.<br />
5. Then ensured for this module in OWA (VDir), ‘Module Type’ is set to ‘Native’ and ‘Entry Type’ is ‘Local’<br />
<br />
I don't know what i have to do. <br />
<br />
Do we solve my sp2- Upgrade problem with this solution?<br />
<br />
THX!
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What 4 is saying is that if you click on the default web site, and then double-click Modules over on the right, then you shouldn't see exppw in the list. &nbsp;But then if you click on 'owa' in the tree view on the left, and then double-click Modules again, it should now be in the list. &nbsp;In other words, you only see expww in the list if you look at the modules at the owa vdir level.<br />
<br />
What 5 is saying is that when you have found it in the list (at the owa level), single-click the entry in the list, scroll the pane to the right, and it should say Native and Local in the two right-hand columns.<br />
<br />
This hopefully will solve the OWA issue, but the &quot;exsetup can not start directly to excecute upgrades. Use Setup.com&quot; &nbsp;problem will be dues to something else completely.
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I am on the default web site -&gt; Modules and i see the exppw.<br />
In owa exppw ist listed and native but not local. It is inherited.<br />
<br />
How can i change both?<br />
<br />
The strange thing now is that the admin can log in to owa, so i put the user in the administrator group and now it is possible for the user to log in. Strange...<br />
i have still the error in eventvwr.
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i have open a second case only for the exchange server.<br />
<br />
Thanks!
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but i have still the problem with my owa log in!
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Okay, it is inherited at the OWA level because it exists at the default web site level. &nbsp;You will need to highlight it in the modules list for the Default Web Site level, and select Remove in the right hand task pane. &nbsp;It will probably also then disappear from the Modules list at the OWA level, but if we are lucky it will still be there. &nbsp;Let me know if it isn't, and we'll re-add it at the OWA level only (and it will then say Local instead of Inherited).
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i removed it and it's also removed from owa. i get it back by 'Configure Native Modules' and select from the list exppw (local) -&gt; iisreset /noforce. Is that correct?
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Do that when you are looking at the properties of the OWA vdir, otherwise you will just put it back at the default web site level.
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i have still the problem and the error in the eventvwr... i will restart the server this evening
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Okay, let me know what happens.
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i have solved the problem on my own.
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<div class="content wysiwyg-content">
Hello,<br />
<br />
since the upgrade to SP2 it is not possible to log in to owa. We found the folling error in the eventvwr: &quot;error trying to load the modul-DLL 'C:\Program Files\Microsoft\Exchange Server\V14\Bin\exppw.dll&quot; (tranlated from German to English)<br />
So we tried to reinstall the CAS-Rolle but we are getting the second error in the program/features: &quot;exsetup can not start directly to excecute upgrades. Use Setup.com&quot;. <br />
<br />
Is the Server still in the upgradeprocess? What ca we do?<br />
<br />
Thank a lot in advance!
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Hello,

since the upgrade to SP2 it is not possible to log in to owa. We found the folling error in the eventvwr: "error trying to load the modul-DLL 'C:\Program Files\Microsoft\Exchange Server\V14\Bin\exppw.dll" (tranlated from German to English)
So we tried to reinstall the CAS-Rolle but we are getting the second error in the program/features: "exsetup can not start directly to excecute upgrades. Use Setup.com". 

Is the Server still in the upgradeprocess? What ca we do?

Thank a lot in advance!

can not log in to owa Exchange 2010

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.