Event 1035 Inboud Autentication failed

Question

_{Wednesday, June 29, 2016 12:20 PM}

Hello,
on my exchange 2016 server i am receiving the following event:

Inbound authentication failed with error LogonDenied for Receive connector Default Frontend EX02. The authentication mechanism is Login. The source IP address of the client who tried to authenticate to Microsoft Exchange is [192.168.2.207].

I didn`t find the solution yet.
192.168.2.207 is the ip of my Kemp-load-balancer.

Anybody who know a Solution for this?

Thx

All replies (6)

_{Thursday, June 30, 2016 10:33 AM ✅Answered}

Yes. here it is :

go to  ADSI Edit, Configuration -> Services -> Microsoft Exchange -> Domain.com-> Administrative Groups -> Exchange Administrative Group -> Servers -> CAS01-> Protocols -> SMTP Receive Connectors, then go to the properties for the "Client Proxy CAS01" .

on the security tab, go to "Authenticated Users" and make sure "Accept any Sender" and "Accept Authoritative Domain Sender" are Allow

_{Wednesday, June 29, 2016 8:11 PM}

what are you trying to send from Kemp load balancer to exchange?

you will need to add the ip of the Kemp LB on the receive connector .

Where Technology Meets Talent

_{Thursday, June 30, 2016 6:47 AM}

Hi Mvd12345,

Did you change anything on the default fronted receive connector?

Please run the following command to check the connect settings:

Get-ReceiveConnector "EX02\Default Frontend Ex02"| fl ID,AuthMechanism,PermissionGroup,RemoteIPRanges

In general, this Error event indicates that the inbound authentication from the specified source on the specified Receive connector has failed. The authentication error and the authentication mechanism are specified in the text of the error message. To resolve this error, we should verify that the Receive connector and the remote client are configured to use a common authentication method with the correct credentials and required certificates.

Best regards,

Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected].

Niko Cheng
TechNet Community Support

_{Thursday, June 30, 2016 8:56 AM}

I fixed this by changing receive from parameters on the connectors with ADSI-edit.

Thx!

_{Thursday, June 30, 2016 10:31 AM}

Hi Mvd,

Could you show the details what you had changed in ADSIEDIT?

That would help other community members to resolve the similar issue, thanks for understanding!

Best regards, 

Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected].

Niko Cheng
TechNet Community Support

_{Friday, July 1, 2016 1:16 AM}

Hi Mvd,

Thanks for sharing!

Please mark the answer to close this thread, it will make answer searching in the forum easier and be beneficial to other community members as well. Thanks for understanding!

Best regards,

Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected].

Niko Cheng
TechNet Community Support