Message Trace Attachment Attribute missing
Message Trace do not include Attachment property and by only knowing attachment name you cannot find it. For example knowing a specific attachment has been leaked out from company but you cannot search it from the Trace.
using eDiscovery is not an option for many reasons - requires special permissions for the user, with admin delegation task can not be processed by correct team. you will not as well find any useful information for mail flow debugging like why message was not processed by the filters and so on.
this is definitely a big gap
Yes, it would be very helpful to have attachment details in message trace. Thanks.
Al Douglas commented
Compliance search can be used to carry out searches of this nature https://support.office.com/en-gb/article/Search-for-and-delete-email-messages-in-your-Office-365-organization-Admin-Help-3526fd06-b45f-445b-aed4-5ebd37b3762a?ui=en-US&rs=en-GB&ad=GB#step1