Outlook 2016 and Exchange Online Repeated Credential Prompt

[Ramesh Vemavarapu]

HI,

We have few users outlook is continiously prompting for credentils ,

We have installed latest O365 version

its working fine on OWA

we have tested that users in different versions like windows 10 and windows 7 machines with latest office

and also we did some changes as per online in registery as below

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity]

"DisableADALatopWAMOverride"=dword:00000001

can some pls help on this 

O365 syncs from AD and all the mailboxes are in O365 now.

[#2]

Hello @Ramesh Vemavarapu,

For me when this happens, 95% of the time there are permissions for that user somewhere.

So if Dan is always getting credential prompts on his outlook, there is a good chance Dan has permissions to some other users mailbox that is not registered properly. Especially if those permissions are still to an old on-prem user.

Try checking both your hybrid exchange and o365 for permissions this user may have. If they are old/unused clean them up.

Adam