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Recurrence button greyed out in Outlook 2010

I recently upgraded my Outlook 2007 to 2010 and I've just noticed the Recurrence button is disabled when creating (or editing) an appointment/meeting. But I can still access the recurrence menu via Ctrl+G. Any ideas on how to enable this button?

Outlook 2010 Toolbar

1 Answer

I have seen before that you can rename the files outcmd.dat & extend.dat to outcmd.dat.old & extend.dat.old. Make sure outlook is closed first then reopen it. The files should be recreated at program startup. If this doesn't work you can simply rename them back.