Rich Text (RTF) Mails, with embedded image, become currupted

Question

We have an Exchange Hybrid configuration.

Sometimes Outlook clients receive a Rich text format e-mail and reply:

When the Outlook client sends a Rich text format e-mail with embedded image to internal Exchange 2016 CU17 server they get an NDR reply.

'Corrupt message content; STOREDRV.Deliver.Exception:ConversionFailedException.ConversionFailedException.TextConvertersException; Failed to process message due to a permanent exception with message The message content has become corrupted. ConversionFailedException: Content conversion: Body conversion failed. [Stage: PromoteCreateReplay]

When the Outlook client gets outside the office and connect to Exchange Online, they have no problem.

When they return inside the office the problem stays away and never returns.

Anyone with the same problem?

Two DAG Exchange 2016 CU17 servers on Windows server 2016.

Microsoft Office 365, Outlook 2013 and Outlook 2016 Clients.

Answer 1

RTF file rarely become corrupts. But if your files not opening properly and showing the STOREDRV.Deliver.Exception error then you really need to give your proper concentration.

Hi Frans Beeers,

Based on the information you provided, it looks like that the mailbox is on litigation hold. Also this exceed the Recoverable Items data. As per the situation, I would love to suggest you to increase your Recoverable Item quota for the mailbox. 

You will get the detailed steps from here: https://docs.microsoft.com/en-us/office365/securitycompliance/increase-the-recoverable-quota-for-mailboxes-on-hold

Regards?

Vaibhav Pal 

Answer 2

Thanks Vaibhav,

Archiving and Litigation are both Disabled

Regards,

Frans

Answer 3

Hi,

Do you have any anti-virus or such third-party tool installed? Disable the tool temporarily and test if the issue persists.

Besides, Rich Text Format is heavily used in the email attachments in phishing attacks, we recommend HTML format in daily use. 

Actually this Exchange Server Development forum is NOT for asking such questions, the previous TechNet Exchange forum has been migrated to Q&A forum, you can post your issues there for better support.

Regards,

Eric Yin

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