You receive a corrupted attachment if email is sent from Outlook that connects to Exchange Server in cache mode

Applies to: Exchange Server 2013 EnterpriseExchange Server 2013 Standard EditionExchange Server 2013 Service Pack 1 More

Symptoms


Assume that you use Microsoft Outlook 2016 to connect to Microsoft Exchange Server 2013 or Microsoft Exchange Server 2016 in cache mode. Then, you send an email message that contains a text attachment whose size is exactly 32,732 bytes. In this situation, the recipient receives a corrupted attachment.

Cause


This issue occurs because the size of the attachment stream isn't handled correctly by remote operations (ROPs).

Resolution


To fix this issue, install one of the following cumulative updates:

Status


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.