SBS2011 server slow and high CPU

Got an sbs2011 server that is incredibly slow. CPU is almost always 100%. Most user functions are working but Outlook is slow. I have to believe its related to the high CPU on the server. Is there any way to tell what's doing this?
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Axis52401Security AnalystAsked:
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Andrej PirmanCommented:
Of course!

first, open TASK MAMAGER, go to PROCESS tab and let is "Show processes of all users" at the bottom. Sort processes by CPU and observe.

Do you have at tleast 8GB RAM on this server? If not, then RAM is definitely one of culprits.
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Axis52401Security AnalystAuthor Commented:
It has 16g ram. I did that and the top one start idle process fluctuates from 68-79 etc. But I don't know what to make of that.
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David Johnson, CD, MVPOwnerCommented:
the idle processes between 68-79% means that your cpu utilization is 21%-32%, in other words the cpu is doing nothing 68-79% of the time.  Your problem probably is disk i/o. You're trying to do too much on one disk and the system is waiting on the disk queue to get its data.
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Axis52401Security AnalystAuthor Commented:
Is there anyway to check that?
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Axis52401Security AnalystAuthor Commented:
Some things I'm seeing. When I open the exchange complexity says MMS snap on fails to.load3 or 4 times then eventually loads after 10 min.
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Andrej PirmanCommented:
Well, if CPU IDLE is 70-80%, then CPU is not a problem.
Might be DISK, as David said.

So, still in TASK MANAGER under PERFORMANCE tab you will see "Open Resource Monitor" at the bottom. Click on it and new monitor will open.
There you will have DISK tab, then expand all 3 tables below (Processes with disk activity, Disk activity and Storage). Spend some time observing, while you SORT BY Read and Write columns. Try to find out, which files and processes use disk Write and mostly READ intensively. Very helpful is to enlarge Resource Monitor over whole screen and expand the columns with FILE NAMES so you can see the whole file name and path.
Example of Resource Monitor
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Axis52401Security AnalystAuthor Commented:
There are a lot of searchprotocolhost.exe running one is 20,000 the next 5,000 etc there are quite a few of them
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Axis52401Security AnalystAuthor Commented:
Another one that keeps popping up and taking a lot is trustedinstaller.exe
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rindiCommented:
Check that your disks and RAID arrays are fine. Replace any bad disks.
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Axis52401Security AnalystAuthor Commented:
I did they all show OK
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