Outlook 2010 suddenly lost connection to office 365

Windows 7, 32- and 64-bit
Office 2010 32-bit
All clients (ca. 65) have been running fine for over 1 Year.

Suddenly 1 client will no longer connect to Office365, keeps asking for password.
Have tried to connect with the clients login-information from an other Workstation, where it works fine.

Have re-installed Office 2010, and re-configured the mail-settings, without a solution.
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Sean FitzpatrickSr Lab Systems EngineerCommented:
Try rerunning the office 365 setup program, where it checks to make sure that you have all the correct programs and windows updates installed.  My first guess would be that you are missing a windows update which could be possibly stopping it from connecting.

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Mai Ali (MVP)Senior Infrastructure ConsultantCommented:
Check if windows time is configured correctly.
olefiskAuthor Commented:
Thank You for your quick replies.

Seems that some of the Office-updates didn't install properly from the WSUS-server, keeps reinstalling the opdates, t.ex Office Service pack 2.
Have done at manual install, and now it seems to connect fine to Office365.

Thank You for the help.
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