OfficeActivity table not found

The screenshot below is self-explanatory:

The OfficeActivity table is present, yet queries cannot find it. This is more than a week since the Office 365 connector was configured and this is just one of the several Sentinel deployments that seem affected by this (we are setting up Sentinel for our customers). Sometimes  the table is found and all is good, then out-of-the-blue, is "gone" again. I will probably open a ticket with Microsoft as my previous post got no comments.