Call Manger upgrade 8.5 to 9

[abattard1]

I was wondering if you could do a direct upgrade from CUCM 8.5 to 9 on a virtual server?  I did not see it clearly stated in release notes.  Also, anyone installed 9 and if so any issues to be concerned with?

Thanks,

Alex                  

[jspilde]

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/compat/ccmcompmatr1.pdf

Page 17 lists the versions you can directly upgrade from.