I have Exchage Server 2003 and I received next message in the Event Log: Source: MSExchangeSACategory: GeneralID: 9154DSACCESS returned an error '0x80004005' on DS notification. Microsoft Exchange System Attendant will re-set DS notification later. What's the problem? Michael

Hi, This issue may occured because of DSProxy detects a problem while obtaining the list of global catalog servers from DSAccess. DSProxy triggers a failure, and the clients cannot connect to the Exchange server. Are you also facing any issue of MAPI connection during event log in applog. Please have a look of section of below URL of Method 3: Configure the DNS server to locate its domain global catalog servers http://support.microsoft.com/kb/895858Anil

My Exchange Server installed on a Domain Controller. This is single DC. This is more message in the Event Log: Source: MSExchangeSA Category: Monitoring ID: 9098 The MAD Monitoring thread was unable to read its configuration from the DS, error '0x80004005'. Michael

Another message in the Event Log: Source: MSExchangeIS Category: General ID: 9662 There was an error obtaining the Unsolicited Commercial Email default filter level from the directory. The error code was 0x80004005. The value remains at 7. Michael

And more message: Source: MSExchangeSA Category: General ID: 1031 One of the System Attendant's task is blocked. Function: CPollDomainExchangeServersGroup::Work Michael

This is not recomended to install exchange on DC base server. Did you tried to Method 3: Configure the DNS server to locate its domain global catalog servers.Anil

Yes I tried Method 3. This was is my first action.