Using GW desktop client, User A forwards an email message as attachment
to all users.

No mobile device can see the attachment. iOS, Android, all versions of
each - none can see that original message. There's no paperclip, no
"download more" prompt, nothing.

GW 2014 R2,
GMS Version: 14.2.0 Build: 279
Maximum attachment size (GroupWise to Device) 4096 KB
(attachment was waaaaay smaller than that)

Don't know when this started. It was only noticed because "User A" is
the CEO and sent something to everybody, and no one could read it on
mobile devices. I have duplicated the scenario using my own account, so
it's not just a one-off.