outlook for mac error authentication failed your username/password

Outlook Error Authentication Failed Your Username/ Password Rather Than

We have contacted them again to ask if there is another fix we can try, but they just send us the same fix again, so I thought Id ask the community for advice.

Basically we have installed Mimecast (version 7.2.1942.19350) to use with Outlook 2010, but randomly (usually after rebooting, but not always) we get the following messageerror.

So its either automated, or someone just copying and pasting a generic fix.

I tried the steps above but it doesnt work, so have raised a case with Mimecast.

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One of these clients is prompted every 5-10 minutes for credentials.

Ticking the checkbox to remember credentials does not fix the situation.

If the keychain list isnt shown in the sidebar, choose View menu Show Keychains.

Select the login keychain in the sidebar, then run some checks.

If it finds ( repairs) any problems, check to see if thats solved the problem.

In the settings dialog, check the autolock settings for the keychain; if its set to lock after, say, 5 minutes, and Outlook checks for incoming messages every 10 minutes, the keychain will lock between each check.

Generally, you want its autolock time to be longer than the email checkin time.

Outlook Error Authentication Failed Your Username/ Password Rather Than

Note: if Outlook caches the password rather than rechecking the password each time, this will not be an issue; I havent used it, so I dont know.).

Note that starting in OS X 10.9, theres a second user keychain (called either Local Items or iCloud), and you may need to delete entries both there in the login keychain.

Its possible theres something wrong with the entry, or its access policy, or there are multiple conflicting entries; deleting recreating the entry is generally the simplest way to fix this.

The above fix resolved the issue and it has been three days now since the last popup.

Thank you.

When the user is prompted for a password in Outlook 2011, it means the password field in Preferences - accounts is blank.

One may also fix this problem by ensuring the password is there in the password field.

If No was clicked or if my password was entered, the message would just appear again after a few seconds.

Whilst this message was on the screen I could not open Outlook on my MacBook.

The password box was empty so I filled it in and the fault message never appeared again and I could open Outlook.

Beware that all the operations had to be performed very quickly between clicking No which removed the message box for about 5 seconds, before it re-appeared again.

So out of despair I simply entered for the login field: logindomain name.com instead of the classic email address or domainlogin or login and tadaaa it stopped.

So visibly theres a problem for the login field with exchange servers.

Ive tried all other suggestions I could find but no success with any of them.

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Outlook For Mac Error Authentication Failed Your Username/Password