Monika, with 15000 users, you might want to consider multiple FE servers. Please check out this FE/BE topology guide from Microsoft for recommended configurations: Direct URL: http://www.microsoft.com/technet/prodtechnol/exchange/2003/library/febetop.m spx TinyURL: http://tinyurl.com/5e6sv Regards, Greg Lara ---------------------------------------------------------------------------- --------------------------- This e-mail message may contain privileged, confidential and/or proprietary information intended only for the person(s) named. If you are not the intended recipient, please destroy this message, and any attachments, and notify the sender by return e-mail. If you are not the intended recipient(s), or the employee or agent responsible for delivering the message to the intended recipient(s), you are hereby notified that any dissemination, disclosure or copying of this communication is strictly prohibited. ---------------------------------------------------------------------------- --------------------------- -----Original Message----- From: monika.k.rabarison@xxxxxxxxxxxxxxx [mailto:monika.k.rabarison@xxxxxxxxxxxxxxx] Sent: Thursday, September 09, 2004 12:04 PM To: [ExchangeList] Subject: [exchangelist] disk space for FE server http://www.MSExchange.org/ We have 15000 users. For a new FE/BE 2003 installation, how much disk space should I need for the FE. I understood it will not contain any mailboxes. The Exchange oraganization will be used only for email. TIA, Monika