No mailbox settings or delegate permissions are lost. Just one person is inconvenienced at a time (the mailbox being moved). From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Danny Sent: Thursday, November 15, 2007 2:20 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Exchange offline defrag timeframe Hi Michael, Thanks for your reply. Good question - I am considering a defrag because users mailboxes grew dramatically and now they are deleting unnecessary items and relocating attachments to the file server. A dozen GB's or more will be removed. If we do move to a different storage group, will any user mailbox settings or delegate permissions be lost? ...D On 11/15/07, Michael B. Smith <swngdnz@xxxxxxxxx> wrote: The first question I would ask is: why do you want to do a defragment? Will you recover more than 30% of storage space? Have you been advised to by PSS? If not, then I wouldn't bother. Taking Exchange offline to do a defrag, without a good reason, is just a waste of time and processor cycles. Besides which, given sufficient disk space, doing a move-mailbox to a new storage group is MUCH less intrusive. From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Danny Sent: Thursday, November 15, 2007 12:10 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Exchange offline defrag timeframe Any idea how long and how much disk space I will need to offline defrag the following platform? Server: Xeon 3.6Ghz, 4GB RAM, RAID 5 on 4 15K RPM SAS drives Exchange Server 2003 SP2 Primary Storage Group = 90GB Secondary Storage Group = 15GB Thanks. --- -- CPDE - Certified Petroleum Distribution Engineer CCBC - Certified Canadian Beer Consumer