We are setting up EPDM and this may just be we missed a set-up step.  I included a screen snip of the issue.

• We are running SolidWorks 2015 SP0 and EPDM.
• We have an archive server set-up.
• I am logged on as a user defined in EPDM.
• When options is selected in the drop-down, no vault is listed and the option is greyed out.