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Email router issue: Not tracking Case emails. Does not contain valid attachment

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Posted on by Community Member Microsoft Employee

Hey guys,

Just upgraded from 2015 to the latest version. Before the upgrade, we were able to use a forward mailbox to track Case emails but that seems to be broken as of lately.

Error seen in the Event Viewer:

#17174 - An error occurred while validating the email message with subject .............................

] could not be delivered because it does not contain a valid attachment. The message was moved to the Undeliverable folder.
at Microsoft.Crm.Tools.Email.Providers.ExchangeEmailMessage.ValidateMessage(Boolean isForwardMailbox)
at Microsoft.Crm.Tools.Email.Providers.ExchangePollingMailboxProvider.ValidateMessageInternal(EmailMessage emailMessage)
at Microsoft.Crm.Tools.Email.Providers.CrmPollingMailboxProvider.Run()

We are currently using Exchange 2010.

Any insight would be really appreciated.

Thanks

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