IssueClipboard ribbon buttons disabled in Outlook 2013 or 2016.
ResolutionOutlook 2013 and 2016 allows replying to emails in the preview pane. Email ribbon buttons are not displayed in preview pane by design by Microsoft. You may access all email ribbons by clicking pop-out above the send button, or set email replies to always pop-out.
- Open Outlook
- Click File > Options
- Click Mail and check Open replies and forwards in a new window