421 concurrent connection - Microsoft Community

i can't connect outlook 2007 server. failed message: 421 concurrent connection. 

can help?

moved from: outlook.com /email / connecting outlook.com apps , devices

generally means wrong settings, if outlook.com mail a/c see

 https://www.howto-outlook.com/howto/outlookcommigrationinfo.htm#outlook2007

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_other/send-test-e-mail-message-the-server-responded-421/ec1c90f3-414f-4e75-bbda-0b67dc5159ce

Office / Outlook / Other/unknown / Office 2007