All, yesterday I de-installed my Exchange Server 2007 and re-installed it on a new server (Windows Server 2008). As I wanted to get rid of some legacy I deleted the Services node etc. from the directory and then started the fresh installation. Bascially everything seemed to work during the installation and the send and receive works if I use OWA. However, I have three problems - which all could be related: If I want to configure the Outlook 2007 client, I get a "The Bookmark is not valid" error. I checked the permissions on the Default GAL object in the Exchange node but the seem to be correct. In the Exchange Server I have an event in the log, which is repeated in pair every 30 seconds An account failed to log on. Subject: Security ID: SYSTEM Account Name: servername$ Account Domain: DOMAIN Logon ID: 0x3e7 Logon Type: 3 Account For Which Logon Failed: Security ID: NULL SID Account Name: servername$ Account Domain: Failure Information: Failure Reason: Unknown user name or bad password. Status: 0xc000006d Sub Status: 0xc0000064 Process Information: Caller Process ID: 0xc1c Caller Process Name: C:\Program Files\Microsoft\Exchange Server\Bin\Microsoft.Exchange.Search.ExSearch.exe Network Information: Workstation Name: servername Source Network Address: - Source Port: - Detailed Authentication Information: Logon Process: Advapi Authentication Package: Negotiate Transited Services: - Package Name (NTLM only): - Key Length: 0 And last (but not least) the event in the Application log: Process MSExchangeFDS.exe (PID=2540). Could not find directory \\servername\ExchangeOAB\93c9b727-407b-4145-aac1-02d480a2b54a. This is normal if the directory has never been generated. Otherwise, make sure this directory and share has read permission for the "Exchange Servers" group. Which is true, I did not find this share on my machine. As I said, I expect them to be somehow related but after hours of surfing and trying to figure out what happens, I am kind of desparate. Is somebody able to help here? Thank youRoger

Hmm, that's kind of strange: I reboot the Exchange Server yesterday several times and waited overnght to make sure everything is properly synced before I post - every time the same problem. Today I did a full reboot of the whole infrastructure (mainly all DCs and the Mail Server) and now 1 and 3 are gone. 2 is still here and I would like to get rid of but at the moment the server seems to work. Any idea with regards to event number 2? Roger

Hi, It seems to be a known product issue which should be fixed in Update Rollup 4 for Exchange Server 2007 SP1 (KB952580). Mike