From: D303M on
These errors have been popping up every fifteen minutes. They started a
couple of days and won't go away. This is Exchange 2007 standard and there
is no clustering.

Event Type: Warning
Event Source: MSExchange ADAccess
Event Category: General
Event ID: 2601
Date: 2/26/2007
Time: 10:43:24 AM
User: N/A
Computer: MAIL01
Description:
Process MSEXCHANGEADTOPOLOGY (PID=1980). When initializing a remote
procedure call (RPC) to the Microsoft Exchange Active Directory Topology
service, Exchange could not retrieve the SID for account
<WKGUID=DC1301662F547445B9C490A52961F8FC,CN=Microsoft
Exchange,CN=Services,CN=Configuration,...> - Error code=8007077f.
The Microsoft Exchange Active Directory Topology service will continue
starting with limited permissions.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.


Event Type: Error
Event Source: MSExchange ADAccess
Event Category: General
Event ID: 2604
Date: 2/26/2007
Time: 10:43:24 AM
User: N/A
Computer: MAIL01
Description:
Process MSEXCHANGEADTOPOLOGY (PID=1980). When updating security for a remote
procedure call (RPC) access for the Microsoft Exchange Active Directory
Topology service, Exchange could not retrieve the security descriptor for
Exchange server object PS-MAIL01 - Error code=8007077f.
The Microsoft Exchange Active Directory Topology service will continue
starting with limited permissions.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.


Event Type: Error
Event Source: MSExchange ADAccess
Event Category: General
Event ID: 2501
Date: 2/26/2007
Time: 10:43:24 AM
User: N/A
Computer: MAIL01
Description:
Process MSEXCHANGEADTOPOLOGY (PID=1980). The site monitor API was unable to
verify the site name for this Exchange computer - Call=DsctxGetContext Error
code=8007077f. Make sure that Exchange server is correctly registered on the
DNS server.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.