UPDATE: It appears that this is fixed in Exchange 2013 CU13:
Remote Server returned ‘554 5.6.0 STOREDRV.Submit.Exception:TextConvertersException; Failed to process message due to a permanent exception with message data truncated TextConvertersException: data truncated’
This is not a common problem, but crops up occasionally.
If you see this message bounce back when responding to a meeting invitation, try the following:
- Set your Outlook profile to cache mode/ Create a new Outlook profile.
- Disable any 3rd party add-ins and/or anti-virus.
From what I have seen, switching to cache mode always fixes this.
<Rant>Cache mode is actually the default and preferred mode. Online mode is only recommended in certain scenarios such as a kiosk or regulated environment that forbids a local cached copy of the mailbox. There is no real advantage to online mode. </End Rant>
As to why this happens? Hard to say, but while you are at it, make sure you are running the latest Outlook build. Or use OWA? 🙂