EPM addin SSO login on BI 4 using AD credentials

Dears,

I'm facing a bit of an issue here, i'm trying to connect EPM addin by using Single Sign On with AD credentials that are stored on CMC, BI components seems to work perfectly on BI side but not EPM addin, when we try to login we get Error code 401 "Not authorized".

Any ideas on how to fix this issue.

Thank you,

Kindest Regards,

Hamda.