Exchange, EventID 1135 This could also be due to the node having lost communication with other active nodes in the failover cluster.

In this article, I provide a list of actions to resolve the error 1135 Exchange 2013 in Windows 2012 R2. Windows 2012 R2 use IPv6 for Failover Cluster...

1. Check IPv6 enabled (network adapter and registry)

2. Check firewall rules, add expections:
Core Networking - Neighbor Discovery Advertisement (ICMPv6-In)
Core Networking - Neighbor Discovery Solicitation (ICMPv6-In)
Failover Cluster Manager (ICMP6-ER-In)
Failover Clusters (ICMP6-ER-In)
Failover Clusters (ICMP6-ERQ-In)

001 002 003 004 005

netsh.exe advfirewall firewall set rule name="Core Networking - Neighbor Discovery Advertisement (ICMPv6-In)" new enable=Yes profile=any netsh.exe advfirewall firewall set rule name="Core Networking - Neighbor Discovery Solicitation (ICMPv6-In)" new enable=Yes profile=any netsh.exe advfirewall firewall set rule name="Failover Cluster Manager (ICMP6-ER-In)" new enable=Yes profile=any netsh.exe advfirewall firewall set rule name="Failover Clusters (ICMP6-ER-In)" new enable=Yes profile=any netsh.exe advfirewall firewall set rule name="Failover Clusters (ICMP6-ERQ-In)" new enable=Yes profile=any

3. Install updates:
http://support.microsoft.com/kb/3033918 Disk resource does not come online in Windows Server 2012 R2 or Windows Server 2008 R2-based failover cluster
http://support.microsoft.com/kb/3066427  You cannot compress Windows image files because of memory leak in Windows 8.1
http://support.microsoft.com/kb/3078584  0x133 or 0x13C Stop error occurs in Windows 8.1 or Windows Server 2012 R2
http://support.microsoft.com/kb/3033930  Hotfix increases the 64K limit on RIO buffers per process for Azure service in Window
http://support.microsoft.com/kb/3077354  Computer freezes when WFP leaks nonpaged pool memory in Windows Server 2012 R2
http://support.microsoft.com/kb/3065013  "0x0000007F" and "0x0000009F" Stop errors in Windows 8.1 or Windows Server 2012 R2
https://support.microsoft.com/kb/3013769 December 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2
https://support.microsoft.com/en-us/kb/3076953 Cluster services go offline when there's a connectivity issue in Windows Server 2012 R2 or Windows Server 2012
Other updates https://support.microsoft.com/en-us/kb/2920151 Recommended hotfixes and updates for Windows Server 2012 R2-based failover clusters

4. If you use different network adapters, disable "Register this connection’s address in DNS" checkbox on the advanced TCP properties of the network adapter used for Cluster Communication/Exchange replications.

5. Check bind order with nvspbind for network adapter http://blogs.technet.com/b/askcore/archive/2010/04/15/windows-server-2008-failover-clusters-networking-part-4.aspx, eg:

6. If use VMWare ESX:
6.1 Remove vShield (VMware Guest Introspection Network Filter Driver, VMware Guest Introspection Driver)

6.2 Increase value (Large Rx Buffers, Small Rx Buffers, Rx Ring # 1, Rx Ring # 2) to maximize network cards VMXnet3 kb.vmware.com/kb/2039495

6.3 Update ESX http://kb.vmware.com/kb/2124669
6.4 Check CPU settings http://kb.vmware.com/kb/1005362