Hi Amin, Hot fix 895949 will have an impact on Blackberry users. Blackberry has a solution for this change, you can lookup the following link, http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/ 8021/8149/8064/Support_-_User_cannot_send_messages_because_the_Send_As_p ermission_has_been_revoked.html?nodeid=1166052&vernum=8 HTH. Regards, Raj Periyasamy MCSE(Messaging), CCNA ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Mahmoud Amin Ismail Sent: Monday, July 10, 2006 11:47 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] SP2 for exchange 2003 and blackberry I have exchange 2003 with SP1 and the critical security fix: 916803 If I upgrade to sp2 and apply the same fix , for sp2, would this have any bad impact on Blackberry users...? Regards, Mahmoud Amin Confidentiality & Disclaimer Note: This e-mail and any attachments thereto contain protected and confidential information intended for the sole use of the addressee individual or organization. If you are not the addressee or an authorized agent for him/it, or if you have received this message by error please notify the sender immediately by returning the message, and delete this copy from your system without any illegal use. The Dar Group shall not be liable for the improper or incomplete transmission of the information contained in this communication nor for any delay in its receipt or damage to your system.