2601, 2604, and 2501 MSExchange ADAccess Event IDs

Andres Bohren

2012-06-23

Hallo zusammen,

Tauchen auf einem Server mit Exchange 2010 im Application Log die EventIDs 2601, 2604, and 2501 von der Source "MSExchange ADAccess" auf, dann gibt’s folgenden Microsoft Knowledgebase Artikel dazu http://support.microsoft.com/kb/2025528

The causes of this lookup failure include, but are not limited to, the following:

Transient DNS failures
Transient issues with Domain Controllers
Transient network connectivity issues
Network switches that have the PortFast functionality disabled on the ports to which the Exchange servers connect

Grüsse

Andres Bohren

Andres works as a Senior Microsoft Cloud Engineer/Architect for midsize to large Enterprises at isolutions in Switzerland. He has a special focus on M365 including Identity, Messaging, Communication, Security and PowerShell but also some Azure Technologies. He is Co-Organisator of the Microsoft 365 Community Schweiz Meetup group and was Speaker at several other Meetups or Conferences. He likes good Food, his Bike and nice Dive spots all over the World.