Removing credentials from Control Panel > Mail > User Accounts > Manage your credentials > Windows Credentials. Making sure that “Always prompt for credentials” is not checked in the account settings. Microsoft says that they’ve found and fixed a bug that causes the problem I’m seeing. My network connections appear to be stable and fast (50Mb/s over wired Ethernet, >20 Mb/s over WiFi.). Since this is happening on several - but not all - Outlook clients, I think that random corruption of a profile or credential is unlikely.
Outlook Anywhere is not configured to use NTLM Authentication. Required Authentication Settings for outgoing server and incoming server. Incorrect password cached in credential storage. Outlook is configured to prompt you for credentials. Microsoft says that any of the following could cause the problem: Once it occurs on a client, it continues repeatedly on that client. Four days later, it happened on a third client.Īlthough the onset seems unpredictable, this is not an intermittant problem. A day later, it happened to another client running a different version of Office on a different OS. Clicking on Send/Receive All Folders does do that, however. During all this time, Outlook continues to indicate that it is connected to the Exchange server and to download messages, but it will not automatically download messages from POP3 servers that are also configured. The popup always claims the focus, making it impossible to type anything into another program. Closing the window or hitting cancel results in another pop-up. Entering the user name and password results in another pop-up. The only way to continue working is to leave the pop-up open and click on another window, giving it the focus. 
With Outlook 2016 on Win 10, entering the user name and password results in another pop-up. The source is Windows Security, and it asks for a user name and password for the Exchange server:
Exchange 2013 server hosted by RackspaceĪbout five minutes after Outlook starts and successfully connects to the Exchange server, a window pops up.I don’t have a fix yet, but I’ll continue to post things as I try them. I’ve been struggling with a problem for the past few days.
0 kommentar(er)
