Cannot install on Exchange 2013 SP1 CU15

[dhirsch3D]

Versions

• Windows Server Version: Server 2012 R2 Standard
• Exchange Version: Exchange 2013 SP1 CU15 (15.0.1263.5)
• Installed DKIM Exchange Version: 3.0.13

Description

When I attempt to install the software using the normal method, it claims to install successfully, but doesn't actually sign anything. When I use the fully manual PowerShell method, I get these errors:

Registering agent
The TransportAgentFactory type "Exchange.DkimSigner.DkimSigningRoutingAgentFactory" doesn't exist. The
TransportAgentFactory type must be the Microsoft .NET class type of the transport agent factory.
Parameter name: TransportAgentFactory
    + CategoryInfo          : InvalidArgument: (:) [Install-TransportAgent], ArgumentException
    + FullyQualifiedErrorId : [Server=EXCH01,RequestId=1a45ee4f-6be7-4bf5-8905-abecbfaf71ae,TimeStamp=2/21/2018 5:12:0
   8 PM] [FailureCategory=Cmdlet-ArgumentException] 2C23DBB3,Microsoft.Exchange.Management.AgentTasks.InstallTranspor
  tAgent
    + PSComputerName        : exch01.fec.local

Enabling agent
Transport agent "Exchange DkimSigner" isn't found.
Parameter name: Identity
    + CategoryInfo          : InvalidArgument: (:) [Enable-TransportAgent], ArgumentException
    + FullyQualifiedErrorId : [Server=EXCH01,RequestId=ab158898-d703-4185-a0e9-9bd2e5877520,TimeStamp=2/21/2018 5:12:0
   8 PM] [FailureCategory=Cmdlet-ArgumentException] 2D5F276A,Microsoft.Exchange.Management.AgentTasks.EnableTransport
  Agent
    + PSComputerName        : exch01.fec.local

I've seen similar errors reported for earlier versions of Exchange, but not for CU15. Any help or suggestions would be appreciated!

-Dave

[o-eazy]

Dave these links might be helpful:
#24

https://support.microsoft.com/en-us/help/2938053/third-party-transport-agents-cannot-be-loaded-correctly-in-exchange-se

[dhirsch3D]

Unfortunately, that issue was fixed in CU5; I'm at CU15. Nevertheless, I did try the fix: no luck.

[Pro]

Make sure that the powershell command in the install script succeeds:

$EXDIR="C:\Program Files\Exchange DkimSigner"
Install-TransportAgent -Name "Exchange DkimSigner" -TransportAgentFactory "Exchange.DkimSigner.DkimSigningRoutingAgentFactory" -AssemblyPath "$EXDIR\ExchangeDkimSigner.dll"

And also make sure that the .dll is at the right place