How to backup outlook before uninstalling
It is very important to backup the outlook .pst files and the .nk2 files before uninstalling outlook.
The pst file contains ALL your Outlook data. Email folders, Contacts, Calendar, Journal and Tasks.
Depending on your version it may also contain Rules as well. The file extension .nk2 is used to represent the AutoComplete file of Microsoft Outlook 2002 and later.
The AutoComplete file is an important part of Outlook. It stores the names of email addresses to which you have previously sent email.
Step 1. Open outlook > Go to files > account settings > click on clients email > open file location
Step 2. right click copy (outlook data file back .pst) > create a new folder in the c: called outlook-backup > right click paste
Note: Make sure to close outlook before copying outlook data file.
Step 3. Download Nirsfot nk2 backup http://www.nirsoft.net/utils/
Step 4. Install nirsoft nk2 backup and open it
Step 5. click file menu > click Backup current nk2 file.
Now you have safely backed up the outlook data file and nk2 autocomplete file.