The PDFMaker may have been disable in your Outlook.
To enable it open Outlook.
Click on > Tools > Trust Center
Choose Add-Ins in the list on the left side of the Trust Center window. Choose Disabled Items in the Manage pop-up menu at the bottom of the Trust Center window. Click Go.
Look in the Disabled Items list for Acrobat PDFMaker Office COM Add-In.
If Acrobat PDFMaker Office COM Add-In is in the list, then select it, click Enable, and click Close. Then close and reopen the Office 2007 application.
Hope this will resolve your issue.
Thanks! PDFMaker was not specifically disabled, but it was not on the Active Application Add-Ins list either, so I added it and now I have my Convert to PDF option back.
Cool!!! These are the exact steps to convert few emails but i used an outlook pst converter application because the no of emails are very large (2600) and attachments are also needed to export. It can be also used to do outlook emails to pdf conversion without need of ms outlook.
You may evaluate here:
Outlook saves its mails as MSG format and PDF is a document format so both are different formats and their is no manual way available, you can go with MSG to PDF Converter software which is reliable and perfect tool which allows users to convert multiple Outlook MSG files to PDF format along with all the attachments and formatting. Read More: http://www.birdiesoftware.com/msg-to-pdf/
Try a commercial utility to convert Outlook MSG file to pdf format because manually you can only convert MSG file. With the help of Manual procedure, you cannot convert MSG file attachments and also cannot perform batch conversion of MSG files. So try third party software to convert MSG file to PDF.