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Apr 13 2023, 07:00 AM - 12:00 PM (PDT)
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Unable to open CAS

Respected Contributor

When I go to and login, the O365 Advanced Security Management page of our test tenant opens instead of the CAS dashboard. What do I need to do to open the CAS dashboard?


Follow up - for anyone else faced with this same issue, I learned that I needed to activate the EM+S E5 license in order to get CAS., e.g. if you just have O365 E5 you don't get CAS.

1 Reply
best response confirmed by Dean Gross (Respected Contributor)

Hi Dean,

As you stated, MCAS requires either EMS E5 or standalone license. Once the appropriate license is assigned to the user they may login to the portal from


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