Informational Message: "Hidden attachments are present; not stripping message." (4268771)

These following or similar is logged in the esmworker logs files:

00:46:01 Synchronized:
00:46:01 Subject: This is a testing email.
00:46:01 Checksum: 379fa6e9-b467-9cf8-6b20-d0ac8caa0fc1 (header)
00:46:01 Hidden attachments are present; not stripping message.

Some hidden attachments will not be able to be reconstructed and can cause Outlook to hang.

This is the expected behaviour.
It is possible to fine tune this behaviour but it is recommended to leave it as the default.

In the Archive Manager Configuration Editor, create a new setting called:
Exchange Store Manager Hidden Attachment Strip Mode

Give it one of the following three Values:

- IfBody (default)
Only strip messages with hidden attachments if the body is also being stripped.
- Always
Strip hidden attachments regardless of whether body is being stripped
- ForceBody
If message has hidden attachments, force the body to also be stripped.