Ondrej Žilinec – IT Blog

When you are facing slow logons into domain and you also get events 1030 and 1006 you need to look into your network. By default Kerberos uses UDP packets to communicate. You need to force Kerberos to use TCP instead of UDP by changing registry key:

HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Control\\Lsa\\ Kerberos\\Parameters

If it doesn’t exists just create it 🙂

Create DWORD key called MaxPacketSize and set it to value 1.

For more infor there is official KB http://support.microsoft.com/kb/244474/en-us

This weekend was again migrating for Exchange 2010 🙂 And right now other problems and solutions 🙂

On one CAS server I logged in via OWA and I’ve got internall error 500 from IIS 7.0.

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Sometimes when you install Exchange, you want to allow users to use their e-mail addresses as a login name. Most of the time UPN suffixes are not usefull. For example you have internal name for domain “company.corp”, but your e-mail addresses are “username@company.com“. You want to give an option for users to log into OWA using “username@company.com” instead of “company.corp\username”.

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