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\aut
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.