Internal Out of Office emails are not being delivered when Exclaimer Cloud is enabled

Relevant Products: Exclaimer Cloud - Signatures for Office 365 

Scenario

You have configured Out of Office emails to be sent to internal accounts, but these emails are not being delivered.

Reason

By default, Out of Office email messages do not have a valid sender in the message envelope and, despite the transport rule having an exception for these email messages, they are being routed to Exclaimer Cloud.

When the Out of Office email messages are passed through Office 365, the connection is rejected - this causes the delivery of the internal Out of Office to emails to fail.

Resolution

Follow these steps to resolve this issue:

1. Sign in to Office 365 then navigate to the Exchange admin center.
   
   
2. Click mail flow on the left-hand side then select the rules tab on the right-hand side.
   
   
3. Double-click the Identify messages to send to Exclaimer Cloud transport rule.
   
   
4. Change the message type exception from Calendaring to Automatic reply.
   
   
   
   
   
   Note:

   The Calendaring exception is no longer required, however, if you find the above changes have a negative effect on your Out of Office emails then please contact the Exclaimer Support team.