I was patching an SBS2011 last week and the sh... hit the fan:
it stopped in the middle of the rollup package and after a reboot all exchange services are disabled.
I enabled them and outlook is working again, but IIS doesn't work at all. So i can't start EMC or any other IIS dependant service. (still they are disabled again after a reboot).
I suspected another service running on port 80 or incorrect bindings, I even stopped all IIS sites, assigned port 80 to 127.0.0.1 & it's own IP but that didn't help either.
I had this problem before with another customer installing ex2010sp2 ru4 I solved this by emptying out the file ManageScheduledTask.ps1 and running the update again.
I can't uninstall the rollup, because it isn't listed in installed updates.
I can't start the update again, because it needs powershell which needs a working poweshell / IIS.
When I connect to IIS https://server01 it says certificate is not ok ( FQDN certicatie is ok, so continue) then it hangs with no timeout ever.
Eventlog shows this:
can't load C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\Owa\auth\exppw.dll so I tried this top from Fiona Liao:
http://social.technet.microsoft.com/Forums/nl-NL/exchangesvrtransport/thread/686d1a90-a016-4a4c-ae2e-6725914a5d5a
I can't seem to find the file applicationhost.config in that directory ? Is that the problem ?