I have a windows forms application running on .NET framework 4.0 on Windows 7 Professional client machines. The application was performing fine for about a year. In the code there is a call to process each role the user is a member of in AD. This first
IsInRole call now takes around 40 seconds and the 7 or so subsequent calls are quick. Users are all members of very few groups. I did recently remove a windows 2003 domain controller from our environment and is replaced with a Server 2012 DC. I did the proper
process of running DCPROMO to remove it from the domain and have made sure the Primary DC is set to a different server. I cannot help to think this is the cause though. If anyone could offer any suggestions of where I could look. I have 3 DCs on our network and
none are remote they are all on a gigabit Ethernet network.
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