• Decide on the type of file your address book will be once it is exported and check to make sure your new email client accepts this type of file. We recommend you export your address book as a .csv (Comma Separated Value) file because most email clients accept this file type.
• Decide on a location in which to save the file of your exported address book. For example, save the file on your desktop, in the Documents folder or in any other convenient location.
  
  

To export your Thunderbird address book:

1. Select Tools > Address Book.
2. Select the address book you want to export.
3. Select Tools > Export.
4. Save the file in the folder of your choice, using the filename of your choice.
   

1. Select File > Import and Export.
2. Select Export to a file.
3. Click Next.
4. Select a file type for the export for Create a file type. Click Next.
5. Select Contacts for Select folder to export from. Click Next.
6. Click Browse. Select a destination folder. Enter a name for the file for Save exported file as.
7. Click Save. Click Next.
8. Select Export “Contact” from folder: Contacts.
9. Click Finish.

To export your Outlook 2010 address book:

1. Select File > Options > Advanced.
2. Select Export.
3. Click Export to a file. Click Next.
4. Select a file type for the export for Create a file type. Click Next.
5. Select the contact folder that you want to export for Select folder to export from. Click Next.
6. Click Browse under Save exported file as. Select a destination folder. Enter a name for the file for File name.
7. Click Save.
8. Click OK.
9. Click Next under Export to a File.
10. Click Finish. 

To export your Outlook 2011 address book:

1. Select Contacts in the View switcher.
2. Select File > Export.
3. Select a file type for the export for What do you want to export.

• To export as tab-delimited text:
  1. Select Contacts to a list (tab-delimited text).
  2. Click the right arrow at the bottom.
  3. Enter a name for the file for Save As. Select a destination folder for Where.
  4. Click Save.
  5. Click Done.
• To export as an Outlook for Mac Data File (.olm):
  1. Select Outlook for Mac Data File (.olm).
  2. Select Contacts. Deselect Tasks, Mail, Notes and Calendar if they are selected.
  3. Click the right arrow at the bottom.
  4. Decide whether you want to delete your contacts from Outlook after exporting them. Select No, do not delete items or Yes, delete items after they are exported.
  5. Click the right arrow at the bottom.
  6. Enter a name for the file for Save As. Select a destination folder for Where.
  7. Click Save.
  8. Click Done.