Explanation/Reference:
Explanation
See step 5 below.
Typically, you convert a quote that you have won into an order. Start with an active quote. Note that once a quote is accepted, you won't be able to revise it.
1. Go to Sales > Quotes.
2. Select the quote you want to create an order from.
3. Click Create Order at the top of the Quote screen.
4. Add a description and indicate whether or not you want to close the opportunity in the Create Order window and click OK.
5. To add products from your opportunity to your quote, click Get Products at the top of the screen, select your opportunity, and click OK.
6. Click the Save button at the bottom right corner of the screen.
References: https://www.microsoft.com/en-us/dynamics/crm-customer-center/create-or-edit-an-order.aspx