To print all contacts by category in an Outlook contact folder, please do as follows:

1. Open the specified contact folder where you will print by category, and click View > Change View > Manage Views. See screenshot:

Note: If the View Settings button is on the View tab, please click View > View Settings, and then skip to Step 3.

2. In the Manage All Views dialog box, please select a view name as you need, and then click the Modify button. See screenshot:

Note: The print styles varies depending on views. The People view is recommended.

3. In the Advanced View Settings dialog box, please click the Filter button. See screenshot:

4. In the Filter dialog box, please specify the filter criteria on the Advanced tab:
(1) Click Field > All Contact fields > Categories.
(2) Select contains from the Condition drop-down list;
(3) Type the specified category name you will print by in the Value box;
(4) Click the Add to List button.

5. Now the filter criteria are added, please click OK buttons successively to close all dialog boxes.
When returning to the contact folder, you will see only contacts with the specified category are filtered out.

6. Press Ctrl + A keys to select all filtered out contacts, and click File > Print.

7. Go ahead to specify a printer, select a print style, and then click the Print button.

So far, you have printed all contacts by the specified category in an Outlook contact folder already.

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