I have a conditional access policy setup for my organization to require enrollment and "approved apps." Despite Microsoft Whiteboard being part of the approved apps list documentation, the Whiteboard for Android app doesn't seem to be included yet, because it blocks signin unless I disable the policy. Hopefully someone will see this thread and be able to make short work of this fix.
Same here. I also have to wonder if it supports App Protection policies. I think it will be a while until it supports approved app. It is listed in Approve Apps in the documentation, because it is supported with iOS. Have you tried a CA policy with the "Require App Protection"? I understand all the issues around using that solution. I am still waiting for my Tenant to support approved app for Lists.