Office 365 Hybrid Constant Credential Prompts

-
Note: The steps below are not recommended by Microsoft. Verify that modern authentication is enabled before moving forward.

When an Exchange users is migrated to Office 365 they may get constant credential prompts. Even if the user enters the correct credentials the prompt will come back in a few minutes. The user might also lose the ability to access shared mailboxes and public folders. 

The fix is to set all of the reg keys below to 1, doing so will enable modern authentication.

Office 2013:
HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\EnableADAL
HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\Version

Office 2016:
HKCU\SOFTWARE\Microsoft\Office\16.0\Common\Identity\EnableADAL

All versions 2013+ Create this even if you are on 2016 where it is enabled by default
HKEY_CURRENT_USER\Software\Microsoft\Exchange\AlwaysUseMSOAuthForAutoDiscover

Restart Outlook and the prompts should go away. 

Comments

Post a Comment

Popular posts from this blog

FSLogix Troubleshooting guide

-
Image
Have an issue you can't solve? I offer consulting engagements and can be reached here: consulting[а 𝐭 ]amorales[․]org This article will cover some common issues I have ran into, and steps on how to resolve them. The guide should be followed  in order  since most of the advanced items are usually not the cause of a problem. If you just set up FSLogix, make sure that you followed every step under  Deploying FSLogix Office 365 Containers  and  Deploying FSLogix Profile Containers Terminology ODFC = Office Data File Containers This is there Office (Outlook, Teams, Licensing) data is stored This can be used in conjunction with UPDs FSL Profiles Replacement for UPDs User profiles are stored here (Office data is stored in the ODFC) Cannot  be used in conjunction with UPDs Non-Issues The items below should be ignored when troubleshooting Local_ files under C:\Users If FSLogix profiles are enabled, these folders can be ignored. They...
Read more

Removing Application UAC Requirements with Shims

-
Image
This guide will show you how to create shims that allow regular users to run applications that normally require local admin. Shims should only be used as a measure of last resort. In many cases simply granting users to certain folders or reg keys eliminates the need to create a shim. You can use LUA Buglight to identify what those reg keys/files are.   How it works The shim will force the application to use "RunAsInvoker" when it is launched. RunAsInvoker tells the application to open with the privilege level of whatever launched it. For example, if a regular user opens the application through explorer.exe (a non admin process) then the application will open with regular user permissions.  Things to keep in mind: Shims should be installed after the application Shims might need to be re-installed if an application is updated Not all apps play well with shims. Make sure to test the application before putting it into production Pre-Requisites Install the Microsoft Applicati...
Read more

Best Practices for Deploying User Profile Disks

-
Image
Have an issue you can't solve? I offer consulting engagements and can be reached here: consulting[а 𝐭 ]amorales[․]org Last Updated 2020-01-03 After months of testing I recommend deploying FSLogix Profile Containers instead of User Profile Disks. You can find my guide here . Some of the items below apply to FSL Profile Containers.  User Profile Disks (UPDs) are great for load balanced RDS farms since it allows users to seamlessly roam from server to server. The goal of this article will be to configure the RDS and file servers in a way that maximizes performance and reduces the likelihood of UPD disconnects. I'll keep this updated any time I find new improvements. Use FSLogix Before you even consider deploying UPDs you need to be aware of  this limitation . On Server 2012 and 2016 (Server 2019 does not have this issue,  but it doesn't support Office ) the Windows Search index is machine wide. This means that when a UPD is disconnected the user's index data is d...
Read more