According to the documentation:
The DLP Agent monitors and blocks sensitive files that a user attempts to save
from Microsoft Office 2010, 2013, and 2016 applications (Word, Excel, and
PowerPoint) to cloud storage and web locations.The following destinations are
monitored by default:■ SharePoint
I tried to exclude corporate sharepoint (for examle https://cloud.domain.com) from monitoring as cloud storage:
1. Agent configuration>Channel filters>Filter by properties:
Ignore, Cloud storage, Path = *.domain.com/*, cloud.domain.com/*
2.Agent configuration>Channel filters>Filter by Network Properties:
IP filters = -,192.168.100.100/32,*
Domain filters (HTTP, HTTPS) = -cloud.domain.com
3. Manage>Policies>*POLICY*>Exceptions:
Recipient match URL Domain = cloud.domain.com
But it didn't help,