Add SharePoint site with a Microsoft Account
I was invited to work on an Office 365 SharePoint Online teamsite. The invitation was sent to a Microsoft Account and I use that account to work on the site as a guest user. That works fine on a normal computer and in mobile browsers. However, I would like to be able to use the SharePoint app on Android as well for this. Currently, that is not possible.
When I try to add a SharePoint URL in the app, the first step is to provide an account. When I insert my Microsoft Account username, the app says the account is not enabled for SharePoint Online.
This is frustrating. I believe it is related to external users.
Joris Tielkes commented
See also the suggestion called "Allow use of the SharePoint Online App for invited external users".