Hopefully this will be a quick and easy question.
First of all, this is NOT a hybrid environment. It is Exchange Online only.
Penny, the user I am working with is not able to see the free/busy information for most of her coworkers.
According to her, this was working an then one day she was no longer able to see the free/busy times for most everybody.
She doesn't get an error other than "free/busy information cannot be displayed".
I am attaching a screenshot so you can see what we are dealing with.
Again, this is only an O365 environment...no on-prem at all.
I looked at the users in the O365 portal and can't see anything different between the ones she can see the free/busy and the ones she can't.
She is using Outlook 2010.