Answer:
Step 1: Set up your mailing list
* If you don’t have a mailing list, you can create one during mail merge. Collect all of your address lists, and add them to your data source
Step 2: Test your Envelope layout
* Go to File > New > Blank document.
Go to Mailings > Envelopes.
Print envelopes
In the Delivery address box, type a sample address to test how an envelope looks when printed.
Type your address in the Return address box.
Return address box
Select Options > Envelope Options and do the following:
Choose the size that matches your envelope or choose Custom size to set size.
Envelope options tab for setting envelope size and address fonts
If needed, choose a font and the left and top offset position for the Delivery address and Return address.
On the Printing Options tab, confirm the correct Feed method is selected, load the envelope to match the illustration, and then choose OK.
Feed options diagram for feeding envelopes into the printer
Choose Print, and then choose Yes to save the return address as the default address.
Step 3: Start the mail merge
Go to Mailings > Start Mail Merge > Envelopes.
Start Mail Merge menu
In the Envelope Options dialog box, check your options and then choose OK.
If you'd like to add a return address, or logo, to your envelope now is a good time to add that.
Choose File > Save.
Step 4: Link your mailing list to your main document
Go to Mailings > Select Recipients.
Type a New List command
Choose a data source. For more info, see Data sources you can use for a mail merge.
Choose File > Save.
Step 5: Add the address block to the envelope
The address block is a mail merge field that you place where you want addresses to appear on the envelope. To better see where press CTRL+SHIFT+8 to turn on paragraph marks (¶).
Place your cursor where you want the address block to go.
Go to Mailings > Address Block and choose a format. For more info, see Insert Address Block.
Address block options
Choose a format in the Insert Address Block dialog box, for the recipient's name as it will appear on the envelope.
If you want, choose the Next record button for mail merge preview results or Previous Previous record button for mail merge preview results to move through a few records in your data source to see how they look.
Choose OK.
Go to File > Save to save your merge document.
Step 6: Preview and Print the envelopes
Accept the Next record button for mail merge preview results or the Previous record button for mail merge preview results to move through a few records in your data source to see how they look.
Choose Finish & Merge > Print Documents.
Step 7: Save your mail merge envelope document
When you save the mail merge envelope document, it stays connected to your mailing list for future use.
To reuse your envelope mail merge document, open the document and choose Yes when Word prompts you to keep the connection. To change addresses in the envelope mail merge document, open the document and accept Edit Recipient List to sort, filter, and choose specific addresses.