File Server Resource Manager can’t send emails

0x8004531c, is the magic number

file server resource manager error

Upon replacing two aging fileservers with two shiny new ones, this time running Windows Server 2012 R2 rather than Server 2008, I came across a strange issue regarding File Server Resource Manager notification emails (you know, like “your quota is full” warnings and so on). As in, it can’t send them, instead giving this message when you attempt to generate a test email:

Failed to send the test e-mail due to the following error: Cannot send the email due to an error. Check the application event log for more information.

Sure enough, when I checked the application event log on the server running FSRM, I found this entry for SRMSVC with event ID 12306:

A File Server Resource Manager Service email action could not be run.

Error-specific details:
Error: IFsrmEmailExternal::SendMail, 0x8004531c, Mailbox unavailable. The server response was: 5.7.1
Client does not have permissions to send as this sender

What’s odd about this, is that it suggests that the email address I’d given FSRM as a “send-as” email address, can’t send emails via our Exchange 2010 server. On our old file servers, it worked just fine with exactly the same settings. It seems Server 2012 R2 has a new requirement!

To fix it, I created a new “Equipment Mailbox” on the Exchange Server (using the Exchange Management Console) called “FSRM-ServerName”, and gave it the email address “FSRM-ServerName@domain.tld”. Then, using the Exchange Management Shell, I gave the server the rights to use that mailbox:

It now all works as expected (and of course I repeated the task for the other server too), but it’s still a mystery to me as to why it’s unnecessary for File Server Resource Manager on Server 2008 but it is on 2012 R2, when surely the issue lies at the Exchange Server end of things?

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