User getting continous prompt to login on Mac Outlook app on all mac devices

Talha 216

we have a client who uses apple products. they have outlook from app store, have exchange online licenses and both the users are getting continuous login prompts on all their mac machines. When I went to check the logins in office portal. it shows as follows. Any idea whats going on here?

ChristyZhang-MSFT 21,276 Reputation points Microsoft Vendor

2021-12-14T07:24:04.04+00:00

Hi @Talha ,

Welcome to our forum!

According to your description, I noticed that the issue seems to be related to the known issue: Outlook 2016 for Mac repeatedly prompts for authentication. Please refer to it and check if it's your case. If so, please try the resolution or the workaround in the article.

If it isn't your case, through my research on the Failure reason in the picture you provide, I found the issue may be related to Azure. Please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. In order to better solve your problem, we will add "azure-ad-authentication" tag. Thanks for your understanding and hope your issue would be resolved soon.

1 answer

Marilee Turscak-MSFT 35,116 Reputation points Microsoft Employee

2021-12-14T23:57:21.497+00:00

As mentioned by @ChristyZang-MSFT, the troubleshooting steps in the Outlook 2016 for Mac article would be a good place to check to resolve your issue.

If this does not resolve the issue, another problem could be that ServicePrincipal object for your app has been disabled (as that's what the error message in your screenshot indicates). If this is the case, you can resolve this by going to Azure portal > Azure AD > Enterprise application > Select your application > Properties, and check that "Enabled for users to sign in" is set to "Yes." If it's set to "No", the app is disabled in your tenant.
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Talha 216 Reputation points

2021-12-15T14:02:05.53+00:00

Hi,,

First suggestion has been forwarded to user and havent received any response yet. They will get back to me in next couple of days. But how come it started happening on all mac devices for the two users in tenant. I a waiting on the response.

For your suggestion, I checked and couldnt find any outlook app populating for them in azure enterprise app portal. Just to mention again they are using outlook from Apple appstore which is free to download.

Regards,
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User getting continous prompt to login on Mac Outlook app on all mac devices

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