Error and Warning Event ID: 2501, 2604, 2601 logged on Exchange 2007 Server

I came across an Exchange 2007 server with CAS, Hub Transport and Exchange UM roles installed that consistently had event ID: 2501, 2604, 2601 from source MSExchange ADAccess logged every 14 to 16 minutes. The events are as follows:

Error: Event ID 2501

Process MSEXCHANGEADTOPOLOGY (PID=1424). 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.

Error: Event ID 2604

Process MSEXCHANGEADTOPOLOGY (PID=1424). When updating security for a remote procedure call (RPC) access for the Exchange Active Directory Topology service, Exchange could not retrieve the security descriptor for Exchange server object serverName – Error code=8007077f.

The Exchange Active Directory Topology service will continue with limited permissions.

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

Warning: Event ID 2601

Process MSEXCHANGEADTOPOLOGY (PID=1424). 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.

Solution

So what fixed it? The error went away after I restarted the server: Microsoft Exchange Active Directory Topology Service in the services console. Note that the following services rely on this:

Microsoft Exchange Unified Messaging

Microsoft Exchange Transport Log Search

Microsoft Exchange Transport

Microsoft Exchange File Distribution

Microsoft Exchange EdgeSync

Microsoft Exchange Anti-spam Update

This essentially means that all your services will briefly go down so be aware of this before you restart it.

I just checked back after 5 hours and haven’t seen those errors and warnings appear since the service was restarted.