In this post we will talk about a recently error that 365 user’s get when they work with office 365 applications.
The mostly popular application with this error it OUTLLOK 365. the error popup just when you open the outlook or it can popup randomly.
The Cause
This error can be caused by multiple reasons such as updating going on in the background, renewing or updating your licenses, using different apps with different license scope, some log in cache, multiple logins which in the same device create credentials conflict, sharing multiple files or documents with different app versions.
Solution
Before you start with the above solutions , please check on your Azure portal if the affected user don’t has different license scope, if he has please fix it . If you use a Proxy service check that you have the right configuration then try to temporary stop any Anti virus and check if it solve the problem.
First solution
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1. ON your Operation system , Go to setting,>Account,>Access work and school, Then disconnect all affected user accounts from
2. Search for Credentials Manager,> Select Windows Manager, Under Windows Manager,>Remove all Microsoft Log in Accounts
3. Go to your Disc C (system disk) , choose users, select the affected user name, open AppData, >local,>Microsoft,> under Microsoft: rename IndentityCache, AuthCache,> rename Outlook
Restart your Computer ant check if it solve the error.
Second solution
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This issue Can occurs because the Autodiscover process that’s used by Outlook receives an unexpected result from a third-party web server when it performs the root domain lookup.
To workaround this behaver you can try :
1. At your Window Start, search Registry Editor and run it as an Admin
2. Locate this path : HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity, then carefully add the following DWORD-32 value keys by right-clicking on a blank space of the Identity folder section on the right. Please rename every key then modify the values to the correspondent ones in brackets :
EnableADAL (value as 1)
DisableADALatopWAMOverride (value as 1)
DisableAADWAM (value as 1)
In Outlook location Autodiscover
DWORD: PreferLocalXML
Value: 0
DWORD: ExcludeLastKnownGoodURL
Value: 1
DWORD: ExcludeHttpsRootDomain
Value: 1
DWORD: ExcludeSrvRecord
Value: 1
DWORD: ExcludeExplicitO365Endpoint
Value: 0
Then Please go to: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity.
In Identities remove all the subfolders (** Do not remove the Identities folder, only the subfolders**).
Restart your Computer ant check if it solve the error.
Third solution
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Open outlook profiles (In Control Panel, search Mail (Microsoft Outlook)), and select it , then create a new outlook profile to the user (Don’t forget to apply any PST file or other Custom configuration )
*** don’t forget to use the new created profile.
Last solution
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Create a new Windows User profile and try to create new fresh outlook profile.
As always test any solution before you try it on production.
SHMUEL H.