Outlook Slow After Migrating to Exchange 2013

, Outlook Slow After Migrating to Exchange 2013

If you’ve just migrated your mailbox to Exchange 2013 and you’re having issues with slowness in Outlook (opening Outlook, reading e-mails, etc.) you may need to adjust something called TcpAckFrequency in the registry.

The default TcpAckFrequency parameter in Windows is 200ms, which does not always work well with Exchange 2013.

Luckily, there is a very simple fix.  Change the timeout setting in the registry as follows:

  • Start Registry Editor (Regedit.exe).
  • Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces
    the interfaces will be listed underneath by automatically generated GUIDs like {0739C22F-850B-BC97-76B3-2F0A99162D13}
  • Click each of the interface GUIDs (there may be more than one) and perform the following:
    On the Edit menu, point to New, and then click DWORD value.
    Name the new value TcpAckFrequency, and assign it a value of 1.
  • Close the Registry Editor.

Restart Windows for this change to take effect

This should fix your performance issue immediately.

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Todd is the Chief Technology Officer and has been working in the field of legal IT since the early 1990’s. In his role at Adaptive, Todd functions as our most senior systems engineer. He works closely with our customers on the proper design and scaling of back-end and front-end network upgrades, including both desktop and server virtualization, backup and DR, document management and best practices for ongoing service and support. Specialties: • Technology Strategy & Roadmap • Infrastructure Design & Optimization • Technology Needs Assessments • Disaster Recovery / Business Continuity • Virtualization Design & Implementation

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