Hi @Vandan Patel ,
Furthermore, when a user is already signed into the computer and their account becomes locked out, the Microsoft Outlook prompt for the password continually appears. However, the prompt does not accept the password due to the account being locked, and it doesn't save the password in the credential manager.
This appears to be the expected behavior when a user account gets locked out. And based on my understanding, it does make sense from the perspective of security.
Given this, instead of attempting to keep the Exchange connectivity when an account gets locked, personally I'd recommend focusing on finding out the culprit of the persistent account lockouts issue.
It's important to note that not all users encounter these challenges.
Have you noticed if these affected users have anything in common? Like, are they happen to be using a same type of mobile device to connect the Exchange mailbox? If so, it's suggested to temporarily sign out from that device and see if there would be any improvement.
Besides, here's some articles which include some of the common causes and troubleshooting steps for account lockouts issues for your reference:
- Common Causes for Account Lockouts
- How to: Account Lockout Troubleshooting Guide
(Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)
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