I ran into a very strange issue last week at one of our local customers.

One of the users was receiving an error when she attempted to access the Workplace Reports group.

It turns out, that for some unknown reason, she was not part of the Active Directory security group ReportingGroup, which is used by CRM to control access to the reporting server, etc.

Adding her to this group corrected the issue.

What I don't understand, is how this happened. This user was added to the system after the initial installation and Automatic Group Management was enabled so she should have been added to the ReportingGroup automatically.

Anyway,if you ever run into Report access errors, check the user's membership into the ReportingGroup.