Before anyone asks- yes, I know we should be on Exchange 2013 and am about to install it, but this is a "now" problem!
Recently, Outlook 2013 has been a bit sluggish connecting to our Exchange 2007 server but the server is old so we've assumed that it's the server at fault. Completely independently, I decided to add a new rule this morning so I clicked "File > Manage Rules & Alerts" and received "The attempted operation failed. An Object could not be found".
My colleague found that you could manage the rules by right-clicking any email and managing the rules that way, so it's specifically using the "File" menu route.
This sounds suspiciously like a similar fault with Out-of-Office a while back which MS had to patch.
Any ideas? I'm wondering whether this fault can be responsible for the client being sluggish against our servers, too, as this slow-down is relatively recent.