MS Outlook 2016 when forwarding a message with an attachment gives an error: "Client operation error". How to treat?

Question

Outlook

MS Outllok 2016 works in conjunction with MS Exchange 2010. PERIODICALLY, on individual messages with attachments, when trying to forward them to another recipient, after typing the accompanying text, at the time of sending, it throws up the "Client operation error" dialog. After that, sending a message does not work in any way, except to create a new one and attach a file there. What is the problem? How can I fix it?

Answer 1

Plugins disabled, run in safe mode - zero results.
The problem is in Outlook 2016.
no solution yet. We will try to roll back office updates.