The majority of my Exchange users are all on Windows 7 and have no issues (at least using Outlook.) but a subset of the executives are ardent Mac users running Outlook 2011 for OS X. One of these clients is prompted every 5-10 minutes for credentials. Ticking the checkbox to remember credentials does not fix the situation. Mac version is 10.7.2. I have already removed and rebuilt the EWS virtual directory on my Client Access server. Outlook anywhere is set to NTLM authentication. None of the Microsoft clients are experiencing this issue. What else can I do to make this issue go away? There may be something off in the way the user's password is being stored in their keychain. Run the Keychain Access utility (from the user's account). If the keychain list isn't shown in the sidebar, choose View menu > Show Keychains. Select the 'login' keychain in the sidebar, then run some checks: • Open Keychain First Aid (under the Keychain Access menu), enter the user's account password, select Repair, and click Start. If it finds (& repairs) any problems, check to see if that's solved the problem. • With the login keychain still selected, choose Edit menu > Change Settings for Keychain 'login'. In the settings dialog, check the autolock settings for the keychain; if it's 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. (Note: if Outlook caches the password rather than rechecking the password each time, this will not be an issue; I haven't used it, so I don't know.) • If neither of those does the trick, try deleting the relevant keychain entry (/entries), and having Outlook recreate them (with the remember credentials option). Note that starting in OS X 10.9, there's a second user keychain (called either Local Items or iCloud), and you may need to delete entries both there & in the login keychain. It's possible there's 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. I had problem with Outlook for Mac - a box kept appearing saying 'Authentication Failed - Invalid Credentials' and asking if I wanted to try entering password. Steps to Fix Outlook 2011 For Mac Keeps Asking Password of Office 365 Account. If the Keychain Access program is corrupted, then whenever the Outlook user is trying to connect with O365 on Mac platform, the password problem arises. As a result, Outlook 2016 for Mac keeps asking for password of Office 365 account. Aug 10, 2014 Double click on the first; it should open another box and check “Show password”. I have to keep entering my admin password, but that’s okay. If the password is correct, move on to the next entry. If the password is incorrect, right click on the entry highlighted and choose “delete entry”. Confirm erase. I probably had 20 entries to go through. ![]() 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. Solved the problem by clicking Outlook during the few seconds after I had clicked 'No' when the message was off the screen. Then clicked Preferences, then Accounts. The password box was empty so I filled it in and the fault message never appeared again and I could open Outlook. Problem solved! 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! I work remotely 99% of the time and never had this problem until I came into the corporate office and hopped on their internal WiFi. That's when the problems started for me. Anyone else notice in the keychain a number of old Exchange password entries? Could that have something to do with it? I decided to purge my system of 7 old entries, leaving only the most recent entry. Keeping my fingers crossed that fixes the problem. Evoluent vertical mouse controller driver for mac intel. I've tried all other suggestions I could find but no success with any of them.
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