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Outlook account showing as invalid

Posted on 2016-09-27
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Last Modified: 2016-10-16
Dear All,

We have a user , whose outlook mail account is showing as invalid for all senders. What could be the possible reason(s)?

Regards,
T
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Question by:TiazfaD
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by:Ivan
ID: 41817582
Hmm.. where is it showing?

Can you post some screen shot :)

Regards,
Ivan.
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Muhammad Mulla earned 2000 total points (awarded by participants)
ID: 41817956
Has the receiver had a name or email address change recently?

It's likely that the old address is cached in your clients Outlook/Exchange accounts. This will vary depending on which version you're running.

Previous to 2010, the nickname cache was stored on the client machine as a .nk2 file. If this is the case, you will need to delete all the senders' .nk2 files. These are stored in %appdata%\Microsoft\Roaming\Outlook.

Outlook 2010 and later stores the nickname cache on the server.  To delete the cache have the user do the following in Outlook:  Click File > Click Options > Click Mail > scroll down to the Send messsages section > Click the button that says Empty Auto-Complete List >  Click Yes on the message that asks if you are sure you want to empty the auto-complete list >  Click OK on the Outlook Options window > Exit Outlook, then re-launch the application.
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by:Muhammad Mulla
ID: 41845513
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