Security Update Caused Problems Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Messaging Software › Exchange 2000 / 2003 › Security Update Caused Problems This topic has 0 replies, 1 voice, and was last updated 13 years, 11 months ago by Richie. Viewing 1 post (of 1 total) Author Posts RichieMember Feb 20, 2007 at 7:06 am #122699 Thought i’d post this, we have started to get problems with Outlook sending mail and calendar requests, kept getting “This message could not be sent. Try sending the message again later” after much head scratching i removed the Exchange Update KB 926666 on the exchange server and all started working again, dont ask me why. In case any one else has these issues. Regards Richard Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.