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SBS2003 Outlook RPC over Http help

Posted on 2009-03-29
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Last Modified: 2012-05-06
HI All, I have just taken over a new site and they have had a problem with RPC email for 6 months now, I have checked and found that they have two ISAPI errors repeating in the app log.
ID 2268 & 2214 The HTTP Filter DLL D:\EXCHSVR\ExchWeb\bin\auth\OwaAuth.dll failed to load.  The data is the error. The dll is at the location stated, permissions on this file are administrators FC, Domain Admins MODIFY, Domain Users READ&EXEC, SYSTEM FC. The ISAPI Filters tab shows the OwaLogon status as shown in attachment. OWA works fine, Sharepoint, companyweb all work fine, it is just RPC email which fails, clients hang for a bit before getting the Exchange server is unavailable error. I have run the ICIEW with no improvement. The Server is SP2, as is Exchange, there are however a lot of updates waiting to come down which I will install tonight. Any help is appreciated.

isapierror.JPG
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Question by:Tingathewinga
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Expert Comment

by:milikad
ID: 24016137
Check in the properties of WEB sites (not default WEB sites)  --- IIS Properties - ISAPI Filter and verify that rpcproxy.dll is present there if not then we need to add it.
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by:Tingathewinga
ID: 24025877
Hi, it is there with green upright arrow, but shows as unknown.
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by:Tingathewinga
ID: 24026650
Ok, all updates installed, rebooted and same errors flooding the event log.
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Accepted Solution

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Tingathewinga earned 0 total points
ID: 24034208
Hi guys, I have fixed the issue and here is what I did for future use.

I reset all IIS permissions but this had no effect, so I then reset permissions on the OwaAuth.dll file and upwards from there to its containing folder D:\EXCHSVR\ExchWeb\bin\auth, once I reset the permissions on this folder to these...
Administrators: Full Control (inherited from the parent folder)
ANONYMOUS LOGON: List Folder / Read Data, Read Attributes, Read Extended
Attributes, Read Permissions
Authenticated Users: Traverse Folder / Execute File, List Folder / Read
Data, Read Attributes, Read Extended Attributes, Read Permissions
(inherited from the parent folder)\
CREATOR OWNER: Special Permissions, inherited from the parent folder (Full
Control)
Server Operators: Traverse Folder / Execute File, List Folder / Read Data,
Read Attributes, Read Extended Attributes, Create Files / Write Data,
Create Folders / Append Data, Write Attributes, Write Extended Attributes,
Delete, Read Permissions (inherited from the parent folder)
SYSTEM: Full Control (inherited from the parent folder)

I then removed the faulty ISAPI filter from the Default Web Site, and re added it now the permissions were correct it came up with a green upright arrow, then restart the default website and all was fixed.

This looks to have been caused by someone moving the whole exchange install instead of just the databases.
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