It is the ongoing issue with redir.aspx, only now it is much much worse. We are experiencing it here. I put 12 on a couple of weeks ago. Appears to now be a known issue. Any of you Exchange MVP types heard anything about a fix? And can I uninstall an RU to get out of this mess?
https://www.reddit.com/r/exchangeserver/comments/40h5d2/looks_like_rollup_12_for_exchange_server_2010_sp3/
