We have a very weird issue where when user (A) sends an email it shows up as user (B) is the sender. This issue seems to be intermittent and doesn't happen all the time. I have checked both full access and send as permissions on both of the user’s account and none of them have access to each other’s account.
User (A) tested sending emails from Outlook to himself and it was showing the email came from user (B).
Anyone has any idea why t this is happening?
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System information
Exchange 2010
SP2 Rollup 5v2
Outlook 2010
Regards,
I.T Systems Engineer