OWA not working after security update

Office web apps for SharePoint 2013 not working after security updates / server patching.

After installation of the following security patches, OWA stopped working there by causing issues with SharePoint 2013.

Details of ULS logs are provided below.

FarmStateReplicator.exe (0x0CD8) Office Web Apps Farm State Error when trying to connect to Farm State Manager service: System.ServiceModel.EndpointNotFoundException: There was no endpoint listening at http:///farmstatemanager/FarmStateManager.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception) --- End of inner exception stack trace --- at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context) at System.Net.HttpWebRequest.GetRequestStream() at System.ServiceModel.Channels.HttpOutput.WebRequestHttpOutput.GetOutputStream() --- End of inner exception stack trace --- Server stack trace: at System.ServiceModel.Channels.HttpOutput.WebRequestHttpOutput.GetOutputStream() at System.ServiceModel.Channels.HttpOutput.Send(TimeSpan timeout) at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.SendRequest(Message message, TimeSpan timeout) at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at Microsoft.Office.Web.Apps.Environment.WacServer.IFarmStateManagerService.GetAllSettings(DateTime lastGetTime, Guid correlationId) at Microsoft.Office.Web.Apps.Environment.WacServer.RemoteFarmSettings.Refresh() at Microsoft.Office.Web.Apps.Environment.WacServer.ACacheableFarmStateObject.Sync(Boolean force) at Microsoft.Office.Web.Apps.Environment.WacServer.AFarmSettings.get_MasterMachineName() at Microsoft.Office.Web.Apps.Environment.WacServer.RemoteFarmState.get_IsMaster() at Microsoft.Office.Web.WacServer.FarmStateReplicator.Replicate()

Understood that the following security updates were installed in the server

Link	Description	HotFixID
http://support.microsoft.com/?kbid=2843630	Update	KB2843630
http://support.microsoft.com/?kbid=2851234	Update	KB2851234
http://support.microsoft.com/?kbid=2898865	Security Update	KB2898865
http://support.microsoft.com/?kbid=2898866	Security Update	KB2898866
http://support.microsoft.com/?kbid=2901119	Security Update	KB2901119
http://support.microsoft.com/?kbid=2901120	Security Update	KB2901120
http://support.microsoft.com/?kbid=2903938	Update	KB2903938
http://support.microsoft.com/?kbid=2904659	Security Update	KB2904659
http://support.microsoft.com/?kbid=2909210	Security Update	KB2909210
http://support.microsoft.com/?kbid=2911101	Update	KB2911101
http://support.microsoft.com/?kbid=2912390	Security Update	KB2912390
http://support.microsoft.com/?kbid=2916036	Security Update	KB2916036
http://support.microsoft.com/?kbid=2917499	Update	KB2917499
http://support.microsoft.com/?kbid=2919393	Update	KB2919393
http://support.microsoft.com/?kbid=2925418	Security Update	KB2925418
http://support.microsoft.com/?kbid=2929755	Update	KB2929755
http://support.microsoft.com/?kbid=2930275	Security Update	KB2930275

The OWA server event logs have the following errors.

---

Service cannot be started. System.InvalidOperationException: The certificate has not been specified.
   at Microsoft.Web.Administration.SiteCollection.Add(String name, String bindingInformation, String physicalPath, Byte[] certificateHash)
   at Microsoft.Office.Web.Environment.WacServer.IisProvisioningUtil.ProvisionNewSite(ServerManager serverManager, String name, String physicalPath, String applicationPoolName, List`1 bindings)
   at Microsoft.Office.Web.Environment.WacServer.AgentManager.AgentController.ProvisionTopLevelSites(IEnumerable`1 webAgentsToRun)
   at Microsoft.Office.Web.Environment.WacServer.AgentManager.AgentController.StartAgents()
   at Microsoft.Office.Web.Environment.WacServer.AgentManager.AgentManagerApplication.OnStart(String[] args)
   at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(Object state)

---

trying to query the webapps machine returns the below error.

Get-OfficeWebAppsMachine

Get-OfficeWebAppsMachine : It does not appear that this machine is part of an Office Web Apps Server farm.
At line:1 char:1
+ Get-OfficeWebAppsMachine
+ ~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Get-OfficeWebAppsMachine], InvalidOperationException
    + FullyQualifiedErrorId : NotJoinedToFarm.AgentManagerNotRunning,Microsoft.Office.Web.Apps.Administration.GetMachineCommand

Get-OfficeWebAppsFarm


Get-OfficeWebAppsFarm : It does not appear that this machine is part of an Office Web Apps Server farm.
At line:1 char:1
+ Get-OfficeWebAppsFarm
+ ~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Get-OfficeWebAppsFarm], InvalidOperationException
    + FullyQualifiedErrorId : NotJoinedToFarm.AgentManagerNotRunning,Microsoft.Office.Web.Apps.Administration.GetFarmCommand

Restart-Service WACSM

WARNING: Waiting for service 'Office Web Apps (WACSM)' to start...
WARNING: Waiting for service 'Office Web Apps (WACSM)' to start...
Restart-Service : Failed to start service 'Office Web Apps (WACSM)'.
At line:1 char:1
+ Restart-Service WACSM
+ ~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OpenError: (System.ServiceProcess.ServiceController:ServiceController) [Restart-Service], ServiceCommandException
    + FullyQualifiedErrorId : StartServiceFailed,Microsoft.PowerShell.Commands.RestartServiceCommand

tried  the below with no result.

dism /online /enable-feature /featurename:IIS-ASPNET45
#reference : http://technet.microsoft.com/en-us/library/jj219455(v=office.15).aspx

Tried

Repair-OfficeWebAppsFarm

Did not work

Finally for the solution

On OWA server:

Remove-OfficeWebAppsMachine

New-OfficeWebAppsFarm -InternalUrl "https://server.contoso.com" -ExternalUrl "https://wacweb01.contoso.com" -CertificateName "OfficeWebApps Certificate" -EditingEnabled

To verify that the farm was created successfully, navigate to:

https://server.contoso.com/hosting/discovery

On SharePoint 2013

# Point PROD to PROD OWA server

Remove-SPWOPIBinding -All:$true

New-SPWOPIBinding -ServerName _owaservername_

#Set-SPWOPIZone -zone "external-https"

Get-SPWOPIZone

Get-SPWOPIZone | Get-SPWOPIBinding

Thankfully did not have to reinstall as mentioned in the article
http://technet.microsoft.com/en-us/library/jj966220.aspx

Quoted below:

Warning:

Applying Office Web Apps Server updates by using the automatic updates process isn’t supported with Office Web Apps Server. This is because updates to an Office Web Apps Server must be applied in a specific way, as described in this article. If Office Web Apps Server updates are applied automatically, users may be unable to view or edit documents in Office Web Apps. If this happens, you have to rebuild your Office Web Apps Server farm. To rebuild a farm, you must remove the Office Web Apps Server from the farm by using Remove-OfficeWebAppsMachine, uninstall Office Web Apps Server by using Add or remove programs, and then reinstall Office Web Apps Server by following the steps that are described in Deploy Office Web Apps Server. After you have reinstalled, apply the update by following the steps that are described in this article. It is important that you review the guidelines in Planning updates for Office Web Apps Server and establish an update process for the Office Web Apps Server farm.