Old version of Microsoft Outlook does not work with Office 365 with MFA enabled, which will faill at sign in stage.
This Guide walk you through with proper configuration to make it work even for old vero of Outlook.
1 Logon to
2 Open this link:
https://portal.office.com/account/ (Or go to My account) Office365.com -> Settings
3 Click on Security & privacy -> Additional security verification -> Create and menagae app passwords
Office 365 -> My account -> Security & privacy
4 Create an App password, give it a proper name, copy the password save it for later use.
5 Open the
6 Type mail in search bar, click on search result
Control Panel -> Search bar
Email Accounts… Mail Setup – Outlook
New… Mail (Outlook) – Accout Settings
Manual setup or additional server types, then click Next. Mail (Outlook) -> Add Account
Microsoft Exchange Server or compatible service, then click Next. Mail (Outlook) -> Add Account
11 Enter the following in the corresponding fields:
Server: outlook.office365.com User Name: username
When finished, click
More Settings … *Warning: Do not click the Check Name button at this step, or the configuration process will fail. Mail (Outlook) -> Add Account
12 Click Security
Mail (Outlook) -> Add Account
Encrypt data between Microsoft Outlook and Microsoft Exchange.
Anonymous Authentication from the Logon network security drop-down menu. Mail (Outlook) -> Microsoft Exchange
14 In the Connection tab, check
Connect to Microsoft Exchange using HTTP, then click Exchange Proxy Settings… Mail (Outlook) -> Microsoft Exchange
15 In the Use this URL to connect to my proxy server for Exchange field, enter
outlook.office365.com. Mail (Outlook) -> Microsoft Exchange Proxy Settings
16 Check the Only connect to proxy servers that have this principal name on their certificate, then enter
msstd:outlook.com in the associated text field. Mail (Outlook) -> Microsoft Exchange Proxy Settings
17 Make following changes:
On fast networks, connect using HTTP first then connect using TCP/IP box.
Basic Authentication from the Use this authentication when connecting to my proxy server for Exchange drop-down menu. Mail (Outlook) -> Microsoft Exchange Proxy Settings
OK. Mail (Outlook) -> Microsoft Exchange Proxy Settings
OK. Mail (Outlook) -> Microsoft Exchange
Check Name. Mail (Outlook) -> Add Account
21 An authentication prompt will appear. Enter your
[email protected] and password form step 4 in the corresponding fields, then click OK. Windows Security – Login
22 Click Next >.
Finish. Your account will be setup and you can open Outlook to begin using your Exchange account. Mail (Outlook) -> Add Account