Android user cannot open office documents without signing in.

Question

Quick background:

We run an on-premises Exchange server and use local active directory accounts.

(No integration to office 365 just Office 2013 suite)

When I open an office attachment from Android Outlook is opens fine. (Word, Excel and PowerPoint)

However now we have a new user that is told they must sign in to open office documents in their mobile device.

(Problem 1)

So they create an account and then it tells them:

Message: AADSTS500200: User account **** is a personal Microsoft account. Personal Microsoft accounts are not supported for this application unless explicitly invited to an organization. Try signing out and signing back in with an organizational account.

(Problem 2)

Two questions:

1. What do I have to do for this user to make it work like it always has?
2. In the future do we need to notify the cloud infrastructure every time we get a new user?

Answer 1

RESOLVED:

To bypass the prompt you must use the mobile device's phone number.

Only figured this out through trial and error, hopefully this will help someone else out.

Answer 2

Yes sir, thank you for responding. I am MS certified and understand the 365 infrastructure.

We will most likely be Azure AD integrated around the middle of next year.

This is a question for your team, how to keep mobile apps functioning in the mean time.

Is there a simple opt-out for mobile devices or should we be removing One Drive before installing Outlook, or installing a specific supported version of the Office mobile office app?

Please keep the thread open for anyone else in a similar migration situation.

Answer 3

Dear mikehennessy2,

Good day! Thank you for posting your query in our community.

The error AADSTS500200 usually occurs if the email is not yet added on your organization's tenant, we recommend contacting local IT or Administrator handling your Active Directory tenant to ensure that the account is added. 

However, since this forum only focus on Microsoft Office 365 products and SharePoint Online/OneDrive built-in features, I found threads which has the similar query with you in Microsoft Q & A Community, such as: AADSTS500200: User account is a personal Microsoft account. Personal Microsoft accounts are not supported for this application unless explicitly invited to an organization. - Microsoft Q&A.

So my suggestion is to post on dedicated All Questions - Microsoft Q&A, the members and engineers in this community are more experienced in this area. You will get a more detailed and professional answer to your problem there.

We appreciate your understanding.

Sincerely,

Jazlyn | Microsoft Community Moderator