I have a server running SBS4.5, and using OWA for exchange 5.5, and have found that any user can log into any users mailbox using OWA. I've checked permissions and can't see anything wrong. It presently has SP4 installed for exchange. Anyone seen this? Could SP4 have broke the security? Don Bentz, MCSE, CCA, MCP+I Computer Management Systems, Inc. 216 South Main Street Columbia City, IN 46725 [260] 248-2191 V [260] 248-2801 F www.cmsinetworks.com <http://www.cmsinetworks.com/> Hate Spam? Click Here <http://www.myaffiliateprogram.com/u/hatespam/e.asp?e=3&id=1037> . This E-Mail is confidential. It is not intended to be read, copied, disclosed or used by any person other than the recipient. Unauthorised use, disclosure, or copying is strictly prohibited and may be unlawful. Computer Management Systems, Inc. disclaims any liability for any action taken in connection of this E-Mail. The comments or statements expressed in this E-Mail are not necessarily those of CMS, Inc. or its subsidiaries or affiliates. postmaster@xxxxxxxxxxx