Exchange 2010, starting in SP2, has some pretty decent throttling logic. By Exchange 2013, the throttling logic is everywhere.
If your mailbox servers run at load - I probably wouldn't add more load during business hours. If they don't - just run the searches. If you have concern, just run one at a time. You can export the DiscoverySearchMailbox to PST using New-MailboxExportRequest. I do not think that it overrides GP, but what do I know? :) From: [email protected] [mailto:[email protected]] On Behalf Of Binner, Lori Sent: Monday, September 29, 2014 10:44 AM To: '[email protected]' Subject: [Exchange] Discovery Searches - questions Hello- I've been asked to run a Discovery search on two different domains that have sent to us or that we have sent to. I would only be searching on the past 90 days because we purge our emails after 90 days. I'm estimating on a typical work day we typically receive 20,000 emails and also can send out approximately 20,000 as well. This does not include our "internal" communications which I have no idea. Thus my questions - Have others found it safe to run Discovery searches during the working hours or should I do this after hours so I don't accidentally cause any system performance issues during the day for users? Or, is this not a problem due to how the searches are performed? When searching for emails to/from a particular outside domain, should I run the 3 months at once or run a month at a time to help not create any issues? If I want to then take the info from the Discovery Search mailbox and write it to .pst, is this possible? Or is it better to run a separate (perhaps, some type of powershell) to get this to a .pst? We lock down .pst on our users workstations via group policy so it makes it a bit difficult for me to do this via my workstation, so again, is there a better, say administrative command or way to do this? We are currently running Exchange 2010 RU2 SP3 Thank you very much for your help and feedback in advance.
