You do not have permission to read the security descriptor on ..

When you get an error like this: "You do not have permission to read the security descriptor on .." when clicking on the Organization Configuration in Exchange Management Console here is what you can do:

1. Close Exchange Management Console.
2. Go to Start -> Run.
3. Type "control keymgr.dll" (without quotation marks), press Enter.
4. Remove all the existing cached credentials.
5. Reopen Exchange Management Console.