Hi,
We moved from exchange 2010 to exchange 2013, we need to configure mail relay connector so that exchange 2013 could receive emails coming from different sources (printer for scan to email, sharepoint....)
I followed an article to create a receive connector for that, I allowed anonymous users (even if on sharepoint and the printer we provide credentials for authentication), We also added the IP addresses of the printer and sharepoint on this receive connector.
It starts working, but after few hours or minutes (it's really random), it just stops working, I looked on error on exchange event viewer, and I found this:
Warning event id 1035 : Inbound authentication failed with error LogonDenied for Receive connector Default Frontend ExchSrv. The authentication mechanism is Ntlm. The source IP address of the client who tried to authenticate to Microsoft Exchange is [Printer IP Address].
From the message I see that the receiver was "Default Frontend ExchSrv" and it is a "FrontendTransport" role. But my receiver I created is a "HubTransport" Role.
I went to the receiver "Default Frontend ExchSrv" and I enabled "Exchange Users" , it started working again. But I don't know for how long.
My question really is that on documentation for the mail relay for printers, It was mentioning to create a receiver with HubTransport role, but it seems it's the FrontendTransport role receiver that is receiving the request. Can someone explain this scenario to me? Do I still need the mail relay receiver I created?
Thank you.
-Mehdi