Forum Discussion
Bulk Complaint Level (BLC) Transport Rule and High Confidence Quarantine
Are you sure it's not Outlook that's causing the issue here? I would expect the configuration you already had in place to affect both the SCL and BCL (we dont get separate whitelists for those after all). Even the examples they have on TechNet deal with setting the SCL, though in the opposite direction: https://technet.microsoft.com/en-us/library/dn720438(v=exchg.150).aspx
I guess you can also try creating a separate policy with the BCL set to 0 and apply it to just the users that are OK to receive those messages.
Thanks for the reply Vasil. I am positive that it isn't the Outlook clients. This processing of the email is done prior to it ever being recieced by the mailbox. Also, due to the vast nature of the emails I am needing excluded, I've tried to stay away from creating rules using words or phrases. This technet article below is one of several that I have been working off of. It has a section for the X-Microsoft-Antispam header I had mentioned as well as the comments about the SCL being set by the BCL scoring. I'm needing the BCL to be ignored, so removing that headed seemed the most logical.
https://blogs.technet.microsoft.com/exovoice/2016/09/12/basic-spam-troubleshooting-in-office-365/
I've asked for help from fellow MVPs on this, but you can also consider opening a support case and getting an official reply.
