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This was the problem for both myself and another user who reported the issue. I finally realized the reason this was happening is that by default the autocomplete cache has a limit of 1000 entries and after that apparently it starts dropping email addresses off as you add new ones and sometimes fails to add new ones.
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The problem as initially reported to me was that some autocomplete entries that used to pop up were no longer showing and new entries were not being added. I figured this out and resolved the issue. Manually deleted RoamCAche from %username%AppData\Local\Microsoft\Outlook\RoamCache Ran File->Options->Mail->Send Messages ->Empty Auto-Complete Listĩ. Made sure all Windows updates were installed and caught up on another PCĨ. Uninstalled all Windows updates since the problem startedĥ. Uninstalled Office and deleted all traces from C: and registry and then reinstalled - no effectĤ. Autocomplete now works partially with some but not of the emails popping up and no new ones get added.Ģ. Deleted RoamCache->repopulated "To" field in a new message with Suggested Contacts->disabled NIC->Clicked Send->Close/Re-open Outlook->Delete message from Outbox-> Enable NIC. Have read numerous posts on SpiceWorks and elsewhere with the same problem listed and am pretty sure I have tried everything listed as a solution - and then some.
Windows 10 microsoft outlook 2003 not working 64 Bit#
1803 and Office 2016 64 bit with my own mailbox and on a Windows 7 32 bit PC running Outlook 2010 32 bit - so PC build doesn't seem to matter. I've duplicated the problem on my computer using Win 10 v.
![windows 10 microsoft outlook 2003 not working windows 10 microsoft outlook 2003 not working](https://www.easeus.com/images/en/data-recovery/drw-pro/remove-outlook-addins.png)
1703) Auto-Complete suggestions are incomplete and in some cases not popping up at all when sending new messages. Multiple users just started complaining that Outlook 2010 64 bit (Exchange 2010, Windows 10 v.