Hi,
Ever since we've deployed Outlook 2010 our users often receive the following message when trying to send a new email or reply :
Could not complete the operation. One or more parameter values are not valid.
The solution has always been to remove a particular auto-complete entry for a specific contact and retry.
What we would like to know however is what is causing this issue in the first place ?
Are there known issues with a specific add-in ?
Anyone ?
...
We never had this issue with 2007.
If you google this, this issue seems to occur all the time everywhere but never read about a known cause.