We are on exchange 2010 and have had some public calendars configured so that it sends a group of people an email anytime something is changed added or deleted. All was well until last night when we rebooted our exchange server and applied some non exchange related patches.
Recently we decommissioned our 2003 server which i suspect may be the root of our problem. This is the first time our 2010 server has been rebooted since the decommissioning of the 2003 server. Another interesting fact is that when i look at the "Send as" permissions they all are showing and SID instead of a user account which leads me to think that a import user account may have been lost when we decommissioned our 2003 server.
Does anyone have any ides on this?