Hi,

Migrating from single 2010 server to 2x 2013 servers in prod and 1x 2013 in DR with a DAG cluster. I haven't begun migrating user mailboxes over yet. Mail is flowing through 365 to 2010 presently.

When running a health report on any 2013 server, I get an unhealthy FrontendTransport error. I suspect this is related to the following event log entries:

Application / MSExchangeTransport

EventID 1025

SMTP rejected a (P1) mail from 'HealthMailbox7730f2644a204d348de7f46d199b7df5@domain.local' with 'Client Proxy EX01' connector and the user authenticated as 'HealthMailbox7730f2644a204d348de7f46d199b7df5'. The Active Directory lookup for the sender address returned validation errors. Microsoft.Exchange.Data.ProviderError

Does anyone have an idea whats causing

The event error indicates that there is something wrong with that HealthMailbox, below is a links that might help.

http://blogs.technet.com/b/admoore/archive/2015/03/11/exchange-2013-health-mailboxes.aspx

Hannel

• Edited by Hannel Hazeley 4 hours 22 minutes ago

I've checked this article.

The mailbox in question shows in both the results of Get-Mailbox -Monitoring and in the /Monitoring Mailboxes container so I assume it is working as it should.

As for the password policy, this is only enforcing a 6-character minimum.

The event error indicates that there is something wrong with that HealthMailbox, below is a links that might help.

http://blogs.technet.com/b/admoore/archive/2015/03/11/exchange-2013-health-mailboxes.aspx

Hannel

• Edited by Hannel Hazeley Friday, April 17, 2015 3:05 AM

The event error indicates that there is something wrong with that HealthMailbox, below is a links that might help.

http://blogs.technet.com/b/admoore/archive/2015/03/11/exchange-2013-health-mailboxes.aspx

Hannel

• Edited by Hannel Hazeley Friday, April 17, 2015 3:05 AM

The event error indicates that there is something wrong with that HealthMailbox, below is a links that might help.

http://blogs.technet.com/b/admoore/archive/2015/03/11/exchange-2013-health-mailboxes.aspx

Hannel

• Edited by Hannel Hazeley Friday, April 17, 2015 3:05 AM

The only way to confirm the healthMailbox is working as it should is to have it recreated itself.

Hi David,

From your description, I recommend you check if the Microsoft Exchange Frontend Transport service is running normally.

What's more, the event 1025 indicates that there is an issue with the health mailbox '7730f2644a204d348de7f46d199b7df5@domain.local', you can recreate it and check the result.

Hope this can be helpful to you.

Best regards,

Yes, I'll get this done and report back.

I'm also installing CU8 tonight, so I will check if these errors exist after doing the update.

So CU8 didn't help. I deleted the AD health account that was giving errors, this stopped the errors for a while but 20 minutes later another health mailbox showed up in the error log and this one doesn't show up in AD.

I'll spend some time reviewing this today and see if I can get rid of the ones producing e

Hi,

Ok. If there is any update, please feel free to let me know.

Best regards,