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Conditional Access Policies, Guest Access and the "Microsoft Invitation Acceptance Portal"
Hello Identity Experts, We are expanding access to our M365 resources to Guests and as such we are modifying our existing CA policies to provide the appropriate restrictions and controls. We are...
- I am afraid this won't work, simply because the Microsoft App Access Panel and MyApps portals aren't available as a Cloud App within Conditional Access. There is a user voice vote available for this to be implemented: https://microsoftintune.uservoice.com/forums/291681-ideas/suggestions/33689335-add-conditional-access-support-to-microsoft-app-ac
For now, I would suggest you create a policy and block applications (e.g. Azure Portal) one by one instead of blocking all applications. Also, you can configure Conditional Access App Control If you're afraid guest and external accounts will abuse (print, etc.) protected data.
AFAIK BilalelHadd is right, Conditionnal Access does not support these apps...
I encountered the same issue for several of my clients.
A workaround we used was simply to ... not use MyApps for the guests (as they were using only Office 365 services).
As we were using custom tool to manage the guests: we change the "inviteRedirectUrl" to avoid the redirection to MyApps.
But that's not the ideal behavior
More info here:
- https://docs.microsoft.com/en-us/azure/active-directory/external-identities/redemption-experience
- https://docs.microsoft.com/en-us/azure/active-directory/external-identities/invite-internal-users