outlook prompt for password

[jijoybabu]

exchange 2013 outlook version 2021

outlook prompt password if the secondary email account(not shared mailbox) added as full access permission 

[#2 · Accepted solution]

If you are only in on-premise, you can try to edit the regedit.

Naviguate to "HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\AutoDiscover" and create a DWORD (32-bit) value, give it the name ExcludeExplicitO365EndPoint and the value 1. (https://www.alitajran.com/prevent-outlook-from-connecting-to-office-365/)

We've also had this problem since the upgrade to Office 2019 and higher.