Below are the recommended steps to update the page numbers of appendices sections.

1. Create a section break in the document by selecting the appropriate location and choosing Page Break in the Insert ribbon.
2. On the Page Layout ribbon in the Breaks section, choose the section break you just created.
3. In the Page Setup dialog box, select the Numbering tab and check Different first page option.
4. In the Page Setup dialog box, select the Layout tab and check the Different odd and even pages option.
5. On the Insert ribbon, select the Page Number option.
6. In the Page Number Format dialog box, select Start at option and enter the page number for the desired start page in the text box provided.
7. Click on OK button.
8. Repeat the steps 5 and 6 for the section break that has been created and for the appropriate page number selection.