We have around 4/5 users who seem to constantly use 20/30% of the CPU. Is there any way to limit the users to use say 10% CPU as a maximum? Most users use <3% CPU so it seems unfair that 5 users cause a massive knock-on to all other users.
I know it doesn't answer your question but have you looked into why they are taking up so much CPU? Seems to be unusually high.
I don't believe you can throttle them on a CPU level but if you can find what they are doing that's taking at so much % you can most likely throttle that.
The problem is the add-ins from a third party - unfortunately there isn't a real fix (we are replacing the antiquated system).
The add ins basically scan the mailbox, create and remove contents and do a few other things. Unfortunately the larger mailboxes take ages and hammer the CPU. They are using cached mode but there are also Citrix users who have to use online mode.
create a new-throttlingpolicy and set the RCAPercentTimeInMailboxRPC to say 10 (its in % per min) and then Set-Mailbox -Identity USER -ThrottlingPolicy POLICY NAME
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