The MIME desktop in Citrix Apps is restricted to students who have created an Engineering account.
Once your account has been created you should be able to access the resources available to it within a minute or two.
For steps to install the Citrix Workspace client, see: https://it.engineering.oregonstate.edu/citrix
For more information, see: https://it.engineering.oregonstate.edu/manage-class-accounts
For assistance, contact College of Engineering IT Support (coe.support@oregonstate.edu).