The latest cumulative update for Exchange Server 2016 is now available on the download center. There is no release for Exchange Server 2013 or Exchange Server 2010 as these products are both in the e...
Updated Jul 01, 2019
Version 2.0
Blog Post
does IPv6 have to be enabled to install CU11?
I try to install a new server in the existing 2016 infrastructure (all other servers Cu10) and decided to immediately install Cu11, setup writes a bunch of errors during Prerequisites Analysis (Either Active Directory doesn't exist, or it can't be contacted. and much more - account check, AD upgrade check), but Cu10 setup on the same system does not find any errors
2012 r2, IPv6 disabled via
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\TCPIP6\Parameters
"DisabledComponents"=dword:ff
and the same configuration on DC's.
In test environment with default IPv6 settings (but IPv6 binding removed from network adapter) CU11 setup does not found any problem during readiness check
I'm pretty sure that disabling IPv6 or unbinding it from NICs is completely unsupported for Exchange. The valid "I have problems related to the use of IPv6" workaround is to use the DWORD value 32 (0x20) to prioritise IPv4 over IPv6 where a choice is possible, but I'm pretty sure I've seen a KB article or a Technet blog type post saying "do not do this, it breaks things". There was a specific exception for Exchange 2007 doing something fairly niche, but 2010 onwards get very funny if you do that.