We have a exchange forest and 3 sub domains in that forest. In total we have around the 34000 mailboxen.
No we experience problems with all the domain controllers (also GC) that they have huge cpu usage. when we run a AD diagnostic in the perfmon we see that the LSASS is a part of the problemen and a process called NSPIbind (name service provider interface?).
When I try to look for people with simulair issues there is just one other person with this problem.. http://social.technet.microsoft.com/Forums/exchange/en-US/7c35986b-803e-49e5-a342-b80779c27e8d/high-lsassexe-on-windows-2008-r2-sp1-global-catalog-servers?forum=exchange2010hosters
We also tried his suggestions but there is no improvement.
We need help....
- Windows 2008 R2
- Exchange 2010
- 1 forest, 3 domains (8 domain controllers, all GC)
Based on your description, I can find that you have refer to a suggestion from a similar question. The hotfix package (KB2500682) was mentioned. Did you mean you have installed it and enable the NSPI caching feature, however there was no improvement?
In addition, please refer to the following articles and troubleshoot this issue.
Troubleshooting High LSASS CPU Utilization on a Domain Controller (Part 1 of 2)
Troubleshooting High LSASS CPU Utilization on a Domain Controller (Part 2 of 2)
Troubleshooting High CPU Usage on a Domain Controller
By the way, you describe the LSASS is a part of the CPU usage problem. So, please temporarily disable security software and perform a clean boot in Windows to check if some third-party software conflicts.
Hope this helps.