At Cortana's search box, type powershellĢ. Open PowerShell with Administrative privileges. So, the first method to solve the authentication issue to Office 365, in Office desktop applications, is to install the Missing Packages for ADAL if you face the issue with your Office 365 Business Account, or the Live ID, if you face the issue with your Office Personal or School account.ġ. Install the Missing Packages for ADAL or LIVE ID.Īccording to Microsoft the authentication issue can appear on Windows 10 v1703 and later, because of missing package information about either the Active Directory Authentication Library (ADAL) or Live ID. If you unable to connect Office Desktop applications to the Office 365 account, apply one of the following methods: Method 1. How to FIX: Cannot Sign-in to Office 365 in Office Desktop Apps. Outlook needs password, but dialog box not appear.Outlook needs password, but dialog box disappears.This tutorial contains instructions to fix the following Sign-in problems in Office desktop applications, when using an Office 365 or Office 365 Business account: However, after typing the user's credentials, the authentication fails every time, despite the fact that the user can log on without any problems in Office 365 and Outlook on the web.

The following issue, was appear in Outlook after updating the Office 365 applications on a Windows 10 PC: After launching Outlook, the program prompts to authenticate with the Office 365 account.

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